TOEFL Academic Vocabulary: 500 Essential Words in Context

Build 500 words for understanding and explaining university-level ideas.

500 cardsLast updated 2026-08-16

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TOEFL tasks reward the ability to follow and explain academic ideas across disciplines. These 500 independently selected cards cover lecture signals, argument and evidence, plus the vocabulary that actually carries biology, geology, astronomy, psychology, history, economics and the arts. Every card includes a plain-English meaning, a usage cue and an original university-context example, so what you build is transferable comprehension and production rather than a memorized list. Import it and the whole deck joins your spaced-repetition schedule. Words you already know stretch out and drop out of sight; the ones that keep slipping come back until they stop slipping. What goes down is the number of words you still don't know — not the time it takes to flip past 500 cards you mostly do.

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Showing 100 representative cards from the full 500-card deck.

Front	Back
analyze (verb)	To study something by breaking it into parts and examining how they work together; used in research and lecture discussion. Example: The professor analyzed the survey data to see which study habits were linked to higher grades.
attribute (verb)	To explain something as caused by a particular factor; used in science and social analysis. Example: The biologist attributed the plants’ rapid growth to the warmer greenhouse temperatures.
author (verb)	To create or produce a text, plan, or study; often used in academic publishing. Example: The historian authored a chapter on migration patterns in the coastal region.
combine (verb)	To join two or more things together into one unit or process; used in methods and problem solving. Example: The course combines lectures with laboratory practice.
consequence (noun)	A result or effect of an action or event; useful in cause-and-effect lectures. Example: One consequence of the policy was a drop in afternoon library traffic.
define (verb)	To state the exact meaning of a word, concept, or term; common at the start of a lecture. Example: Before discussing the issue, the professor defined what counts as sustainable tourism.
differentiate (verb)	To show or recognize how things are not the same; often used in comparison sections. Example: The lecture differentiated between correlation and causation.
examine (verb)	To look at something carefully and in detail; common in research, reading, and test analysis. Example: The professor examined the chart to see why enrollment dropped in spring.
feature (noun)	A noticeable part or characteristic of something; used in descriptions of objects, systems, or studies. Example: A key feature of the experiment was that it measured both speed and accuracy.
identify (verb)	To recognize and name something specifically; frequent in evidence-based tasks and readings. Example: The students identified the main cause of the error as a faulty calibration step.
indicate (verb)	To point to, show, or suggest a result or meaning; frequent in graphs and reports. Example: The chart indicates that reading time increased during finals week.
involve (verb)	To include as a necessary part or to require participation; used in process and method descriptions. Example: The project involves interviewing local residents about water use.
mean (verb)	To signify or refer to; used when a speaker defines terminology or clarifies wording. Example: In this chapter, the term renewable means energy that can be replaced naturally.
observe (verb)	To watch carefully or notice in order to learn something; frequent in science and field work. Example: The botanist observed that the flowers opened earlier in warmer conditions.
perspective (noun)	A way of thinking about or viewing a topic; common in discussions of history, culture, and argument. Example: The lecture presented the issue from a community perspective rather than a business one.
primary (adjective)	Most important or first in rank, order, or focus; used to show emphasis in lectures. Example: The primary reason for the delay was a shortage of lab equipment.
reflect (verb)	To show or express something indirectly, or to think back on carefully; used in interpretation and evaluation. Example: The pattern in the results may reflect a difference in preparation time.
respond (verb)	To react to something or answer in a particular way; common in experiments and discussion. Example: The plants responded to the new fertilizer with faster leaf growth.
specific (adjective)	Exact, clearly defined, and not general; important in instructions and details. Example: The professor asked for specific examples from the reading, not broad opinions.
translate (verb)	To express the meaning of words or ideas in different language or simpler wording; useful in paraphrase and interpretation. Example: The teacher translated the technical paragraph into plain language for the class.
address (verb)	To deal with a problem or topic directly; often used in lecture organization and solutions. Example: The lecture addressed student stress by discussing sleep and time management.
complicate (verb)	To make something more difficult to understand or solve; used in problem analysis. Example: Extra variables complicated the interpretation of the survey results.
counterpart (noun)	A person or thing that has a similar role or function in another place or group. Example: The research team in Canada shared results with its counterpart in Australia.
evolve (verb)	To develop gradually over time; common in biology, language, and social change. Example: The city’s transit system evolved as the population grew.
adaptation (noun)	A heritable trait that improves survival or reproduction in a particular environment; used in evolution and ecology. Example: The lecture explained how thick fur is an adaptation that helps arctic mammals conserve heat during winter.
cellular (adjective)	Related to cells, especially their structure or activity; used in biology and medicine. Example: The lecture linked cellular damage to how toxins interfere with energy production.
dense (adjective)	Packed closely together or having a high concentration; used in biology, population studies, and ecology. Example: The report described a dense population of algae that reduced sunlight in the pond.
flora (noun)	The plant life of a region or habitat; used in botany and ecology. Example: The survey listed rare alpine flora that grows only on exposed mountain slopes.
larva (noun)	An immature form that looks different from the adult stage in many animals; used in zoology and development. Example: The lecture described how the larva feeds aggressively before transforming into a pupa.
prey (noun)	An animal hunted or eaten by another animal; used in ecology and zoology. Example: When prey becomes scarce, predators may travel farther to find food.
sustain (verb)	To support the continued existence of something over time; used in ecology, agriculture, and environmental science. Example: The river can sustain fish populations only if water quality remains high.
absorb (verb)	To take in or soak up, especially water, light, or nutrients; used in biology, botany, and soil science. Example: Plant roots absorb water quickly after a summer rain.
arable (adjective)	Suitable for growing crops; used in agriculture and land-use studies. Example: Only a small part of the valley was arable because the rest was rocky or too steep for farming.
canine (noun)	A member of the dog family; used in zoology and comparative anatomy. Example: The study compared the skull of a canine with that of a feline to show dietary differences.
deficient (adjective)	Lacking something essential; used in nutrition, soil science, and biology. Example: The soil was deficient in nitrogen, so the leaves turned pale.
fungus (noun)	A living organism such as a mold or mushroom that absorbs nutrients from other material; used in biology and ecology. Example: The fungus spread through damp wood after the basement flooded.
host (noun)	An organism that provides shelter or resources for another organism; used in parasitology and ecology. Example: The parasite depends on a host to complete its life cycle.
larval (adjective)	Relating to the larva stage before adulthood; used in entomology and developmental biology. Example: The larval form feeds on leaves, while the adult insect feeds on nectar.
migration (noun)	Seasonal or regular movement from one region to another; used in ecology and animal behavior. Example: The migration of monarch butterflies depends on milkweed and warm air currents.
population (noun)	A group of organisms of the same species in one area; used in ecology and biology. Example: The population of deer increased after the wolves left the region.
aerosol (noun)	Tiny solid or liquid particles suspended in air. In climate science, aerosols can affect sunlight, clouds, and visibility. Example: The reading described volcanic aerosols as particles that briefly cooled the region.
atmosphere (noun)	The layer of gases surrounding a planet or moon. In Earth science, it controls weather, climate, and heat retention. Example: The professor explained that Earth’s atmosphere traps some outgoing heat and supports life.
buoyancy (noun)	The tendency of an object or fluid to rise or stay afloat in a less dense medium. In oceanography and physics, it explains floating and vertical movement. Example: The lecture used buoyancy to explain why warm water rises above colder water.
Celsius scale (noun phrase)	A temperature scale used in science and everyday measurement, on which water freezes at 0 degrees and boils at 100 degrees under standard pressure. Example: The weather report used the Celsius scale for international comparison.
conduction (noun)	Transfer of heat or electricity through direct contact. In physics and geology, it describes energy moving through solids without bulk motion. Example: The professor contrasted conduction in metal with slower heating in rock.
current (noun)	A directed flow of water, air, or electric charge. In oceanography, currents move heat and nutrients across large distances. Example: The reading described a warm current carrying tropical water toward the coast.
diurnal (adjective)	Occurring daily or related to the cycle of one day. In climate science, it often describes temperature changes between day and night. Example: The report noted a diurnal warming pattern in the desert valley.
dormant (adjective)	Inactive for the moment but still capable of becoming active later. In geology, it often describes a volcano that is quiet but not extinct. Example: The volcano was dormant, yet scientists continued to monitor gas output.
fault (noun)	A fracture in Earth’s crust along which movement has occurred. In geology, faults can generate earthquakes. Example: The map showed a fault running beneath the mountain range.
geothermal (adjective)	Relating to heat from inside the Earth. In geology and energy studies, it refers to internal thermal activity. Example: The article described geothermal vents that warmed the surrounding water.
ice cap (noun phrase)	A large mass of ice covering less than a continent. In climate and polar science, it stores frozen water and influences sea level. Example: The report warned that the ice cap was shrinking during warmer summers.
lava (noun)	Molten rock that reaches Earth’s surface during a volcanic eruption. In geology, it cools to form igneous rock. Example: The eruption sent lava down the slope, where it hardened into dark rock.
mass (noun)	The amount of matter in an object. In physics and astronomy, it affects gravity, motion, and weight-related calculations. Example: The comparison showed that the planet has much greater mass than Earth’s Moon.
monsoon (noun)	A seasonal wind pattern that brings a marked change in rainfall. In climate studies, it often refers to a wet season with heavy precipitation. Example: The report explained how the monsoon delivered months of steady rain.
perihelion (noun)	The point in a planet’s orbit closest to the Sun. In astronomy, it is the opposite of aphelion. Example: The textbook noted that Earth reaches perihelion in early January.
polar (adjective)	Relating to Earth’s poles or to very cold regions near them. In climate and oceanography, it often describes conditions, winds, or waters near the Arctic or Antarctic. Example: The reading compared polar air with warmer tropical air masses.
rainfall (noun)	The amount of rain that falls in a specific place and time. In climate studies, it is a key measure of precipitation patterns. Example: The model predicted a rise in rainfall during the coastal wet season.
seismic (adjective)	Relating to earthquakes or vibrations in the Earth. In geophysics, seismic data reveal internal structure and fault activity. Example: The seismic readings indicated movement along a hidden fault.
sublime (verb)	To change directly from a solid to a gas without becoming liquid. In chemistry and atmospheric science, this occurs under specific pressure conditions. Example: Dry ice can sublime quickly in warm room air.
allocate (verb)	To assign resources, time, or money to a purpose. In economics and public policy, it often means deciding where limited funds should go. Example: The city allocated more money to transit than to road expansion after reviewing commuter data.
inequality (noun)	An uneven or unfair difference in wealth, power, or opportunity. In sociology and economics, it usually refers to systematic gaps between groups. Example: The lecture linked income inequality to differences in school access and long-term health outcomes.
reform (noun)	A planned change meant to improve a system or institution. In history and politics, it usually refers to laws or policies introduced to fix problems. Example: The reform expanded voting access after years of public pressure.
survey (noun)	A method of collecting data by asking many people questions. In sociology, economics, and psychology, it is used to measure attitudes or habits. Example: A survey of first-year students found stress levels were highest during exam week.
status (noun)	A person’s position or rank within a group or society. In sociology and politics, it can affect influence and access to resources. Example: The study found that job status strongly affected who spoke first in meetings.
variable (noun)	A factor that can change or take different values. In economics, psychology, and sociology, it is used in research and data analysis. Example: The professor treated family income as one important variable in the model.
stress (noun)	Physical or mental strain caused by pressure or difficulty. In psychology, it is a major topic in health and performance. Example: The article linked chronic stress to poor concentration during finals.
community (noun)	A group of people living in the same area or sharing interests and social ties. In sociology and history, it often refers to local collective life. Example: The community organized meetings to discuss school funding.
urban (adjective)	Related to cities and city life. In sociology, economics, and history, it often describes population patterns and services. Example: Urban neighborhoods with dense housing usually need different transit planning.
social (adjective)	Related to people living together in groups or to society in general. In sociology and anthropology, it is a broad term for group life. Example: Social expectations can shape how students speak in seminars.
consistent (adjective)	Showing the same pattern or behavior over time. In research and statistics, it suggests reliability or regularity. Example: The findings were consistent across both student groups.
policy (noun)	A plan or rule adopted by an institution or government. In politics and economics, it directs decisions and behavior. Example: The policy limited the use of single-use plastics on campus.
consensus (noun)	General agreement among a group. In politics and sociology, it often refers to broad support for a decision. Example: The council reached consensus after hours of discussion.
trade (noun)	The buying, selling, or exchange of goods and services. In economics and history, it is central to markets and long-distance contact. Example: Trade between the ports increased after the new harbor opened.
profit (noun)	Money earned after costs are subtracted from revenue. In economics and business history, it indicates financial gain. Example: The bookstore’s profit fell when rent increased sharply.
property (noun)	A thing owned by a person, group, or government. In economics and history, it often refers to land or assets. Example: The debate centered on whether property taxes should fund local schools.
impact (noun)	A strong effect or influence. In economics, politics, and history, it often describes the results of a policy or event. Example: The budget cut had a major impact on student services.
emerge (verb)	To appear, become visible, or develop over time. In history and sociology, it often describes new patterns or ideas arising. Example: A new coalition emerged after months of negotiation.
distribution (noun)	The way something is spread out among people or places. In economics and sociology, it often refers to income, resources, or population patterns. Example: The map showed a clear distribution of poverty across the region.
aesthetic (adjective)	Relating to beauty, style, or artistic appearance; often used when discussing how a work looks or feels. Example: In an art seminar, the professor noted the building’s aesthetic effect came from its clean lines and natural light.
brochure (noun)	A short printed or digital booklet that presents information, usually for promotion or explanation. Example: A museum brochure outlined the exhibit themes, opening hours, and guided-tour options.
curate (verb)	To select, arrange, and present materials for an exhibit or collection. Example: The museum team curated the show to connect ancient jewelry, trade routes, and status symbols.
faction (noun)	A smaller group within a larger organization, often with different interests or opinions. Example: The business case study described a faction within the company that opposed the merger.
heritage (noun)	Valuable traditions, buildings, objects, or customs passed down from the past. Example: The city protected the district as cultural heritage because it reflected several centuries of trade and migration.
manuscript (noun)	A text written by hand or a draft prepared for publication. Example: The historian compared several manuscripts to identify later changes made by copyists.
motif (noun)	A repeated image, idea, or design that helps unify a work. Example: In the poem, water was a motif linked to memory and loss.
patron (noun)	A person who supports artists, writers, or institutions, often financially. Example: The playwright depended on a patron who funded the production and the printed program.
repertoire (noun)	A set of works, skills, or pieces that a performer or group can present. Example: The pianist expanded her repertoire to include more contemporary compositions.
style (noun)	A distinctive way of expressing or making something. Example: The essay compared the writer’s compact style with the painter’s highly detailed one.
visualize (verb)	To form a clear picture in the mind or represent something visually. Example: Students were asked to visualize the ruined forum before reading the site plan.
compile (verb)	To collect information or pieces from different sources and arrange them together. Example: The historian compiled letters, maps, and receipts to build a fuller account of the estate.
practical (adjective)	Useful and based on real conditions, not just theory. Example: The practical choice for the exhibit lighting was the one that protected the paper while still showing color clearly.
adjacent (adjective)	Next to or sharing a boundary. Usage context: geography/architecture. Example: In the lecture hall, the library was adjacent to the science building, so students could move between them quickly.
bias (noun)	A tendency that favors one side unfairly. Usage context: research/methodology. Example: The researcher checked for bias before publishing the survey findings.
convince (verb)	To persuade or cause to believe. Usage context: debate/argumentation. Example: The evidence was strong enough to convince the audience that the policy would work.
discrete (adjective)	Separate and distinct. Usage context: mathematics/science. Example: The lecture divided the population into discrete groups for analysis.
ensure (verb)	To make certain. Usage context: procedure/safety. Example: The lab supervisor checked the seals to ensure the samples would not leak.
explicit (adjective)	Stated clearly and directly. Usage context: writing/instruction. Example: The syllabus gives explicit instructions for the final project.
implement (verb)	To carry out or put into effect. Usage context: policy/management. Example: The department implemented a new attendance rule after faculty approval.
induce (verb)	To cause or bring about. Usage context: science/medicine. Example: The researchers used heat to induce a chemical reaction.
integral (adjective)	Essential or necessary as a part. Usage context: systems/organization. Example: Lab reports are an integral part of the biology course.

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Editorial method and sources

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ETS: TOEFL iBT content and structure