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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What's inside

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

Front	Back
analyze (verb) — what does it mean?	To study something by breaking it into parts and examining how they work together; used in research and lecture discussion.
attribute (verb) — what does it mean?	To explain something as caused by a particular factor; used in science and social analysis.
author (verb) — what does it mean?	To create or produce a text, plan, or study; often used in academic publishing.
combine (verb) — what does it mean?	To join two or more things together into one unit or process; used in methods and problem solving.
consequence (noun) — what does it mean?	A result or effect of an action or event; useful in cause-and-effect lectures.
define (verb) — what does it mean?	To state the exact meaning of a word, concept, or term; common at the start of a lecture.
differentiate (verb) — what does it mean?	To show or recognize how things are not the same; often used in comparison sections.
examine (verb) — what does it mean?	To look at something carefully and in detail; common in research, reading, and test analysis.
feature (noun) — what does it mean?	A noticeable part or characteristic of something; used in descriptions of objects, systems, or studies.
identify (verb) — what does it mean?	To recognize and name something specifically; frequent in evidence-based tasks and readings.
indicate (verb) — what does it mean?	To point to, show, or suggest a result or meaning; frequent in graphs and reports.
involve (verb) — what does it mean?	To include as a necessary part or to require participation; used in process and method descriptions.
mean (verb) — what does it mean?	To signify or refer to; used when a speaker defines terminology or clarifies wording.
observe (verb) — what does it mean?	To watch carefully or notice in order to learn something; frequent in science and field work.
perspective (noun) — what does it mean?	A way of thinking about or viewing a topic; common in discussions of history, culture, and argument.
primary (adjective) — what does it mean?	Most important or first in rank, order, or focus; used to show emphasis in lectures.
reflect (verb) — what does it mean?	To show or express something indirectly, or to think back on carefully; used in interpretation and evaluation.
respond (verb) — what does it mean?	To react to something or answer in a particular way; common in experiments and discussion.
specific (adjective) — what does it mean?	Exact, clearly defined, and not general; important in instructions and details.
translate (verb) — what does it mean?	To express the meaning of words or ideas in different language or simpler wording; useful in paraphrase and interpretation.
address (verb) — what does it mean?	To deal with a problem or topic directly; often used in lecture organization and solutions.
complicate (verb) — what does it mean?	To make something more difficult to understand or solve; used in problem analysis.
counterpart (noun) — what does it mean?	A person or thing that has a similar role or function in another place or group.
evolve (verb) — what does it mean?	To develop gradually over time; common in biology, language, and social change.
adaptation (noun) — what does it mean?	A heritable trait that improves survival or reproduction in a particular environment; used in evolution and ecology.
cellular (adjective) — what does it mean?	Related to cells, especially their structure or activity; used in biology and medicine.
dense (adjective) — what does it mean?	Packed closely together or having a high concentration; used in biology, population studies, and ecology.
flora (noun) — what does it mean?	The plant life of a region or habitat; used in botany and ecology.
larva (noun) — what does it mean?	An immature form that looks different from the adult stage in many animals; used in zoology and development.
prey (noun) — what does it mean?	An animal hunted or eaten by another animal; used in ecology and zoology.
sustain (verb) — what does it mean?	To support the continued existence of something over time; used in ecology, agriculture, and environmental science.
absorb (verb) — what does it mean?	To take in or soak up, especially water, light, or nutrients; used in biology, botany, and soil science.
arable (adjective) — what does it mean?	Suitable for growing crops; used in agriculture and land-use studies.
canine (noun) — what does it mean?	A member of the dog family; used in zoology and comparative anatomy.
deficient (adjective) — what does it mean?	Lacking something essential; used in nutrition, soil science, and biology.
fungus (noun) — what does it mean?	A living organism such as a mold or mushroom that absorbs nutrients from other material; used in biology and ecology.
host (noun) — what does it mean?	An organism that provides shelter or resources for another organism; used in parasitology and ecology.
larval (adjective) — what does it mean?	Relating to the larva stage before adulthood; used in entomology and developmental biology.
migration (noun) — what does it mean?	Seasonal or regular movement from one region to another; used in ecology and animal behavior.
population (noun) — what does it mean?	A group of organisms of the same species in one area; used in ecology and biology.
aerosol (noun) — what does it mean?	Tiny solid or liquid particles suspended in air. In climate science, aerosols can affect sunlight, clouds, and visibility.
atmosphere (noun) — what does it mean?	The layer of gases surrounding a planet or moon. In Earth science, it controls weather, climate, and heat retention.
buoyancy (noun) — what does it mean?	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.
Celsius scale (noun phrase) — what does it mean?	A temperature scale used in science and everyday measurement, on which water freezes at 0 degrees and boils at 100 degrees under standard pressure.
conduction (noun) — what does it mean?	Transfer of heat or electricity through direct contact. In physics and geology, it describes energy moving through solids without bulk motion.
current (noun) — what does it mean?	A directed flow of water, air, or electric charge. In oceanography, currents move heat and nutrients across large distances.
diurnal (adjective) — what does it mean?	Occurring daily or related to the cycle of one day. In climate science, it often describes temperature changes between day and night.
dormant (adjective) — what does it mean?	Inactive for the moment but still capable of becoming active later. In geology, it often describes a volcano that is quiet but not extinct.
fault (noun) — what does it mean?	A fracture in Earth’s crust along which movement has occurred. In geology, faults can generate earthquakes.
geothermal (adjective) — what does it mean?	Relating to heat from inside the Earth. In geology and energy studies, it refers to internal thermal activity.
ice cap (noun phrase) — what does it mean?	A large mass of ice covering less than a continent. In climate and polar science, it stores frozen water and influences sea level.
lava (noun) — what does it mean?	Molten rock that reaches Earth’s surface during a volcanic eruption. In geology, it cools to form igneous rock.
mass (noun) — what does it mean?	The amount of matter in an object. In physics and astronomy, it affects gravity, motion, and weight-related calculations.
monsoon (noun) — what does it mean?	A seasonal wind pattern that brings a marked change in rainfall. In climate studies, it often refers to a wet season with heavy precipitation.
perihelion (noun) — what does it mean?	The point in a planet’s orbit closest to the Sun. In astronomy, it is the opposite of aphelion.
polar (adjective) — what does it mean?	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.
rainfall (noun) — what does it mean?	The amount of rain that falls in a specific place and time. In climate studies, it is a key measure of precipitation patterns.
seismic (adjective) — what does it mean?	Relating to earthquakes or vibrations in the Earth. In geophysics, seismic data reveal internal structure and fault activity.
sublime (verb) — what does it mean?	To change directly from a solid to a gas without becoming liquid. In chemistry and atmospheric science, this occurs under specific pressure conditions.
allocate (verb) — what does it mean?	To assign resources, time, or money to a purpose. In economics and public policy, it often means deciding where limited funds should go.
inequality (noun) — what does it mean?	An uneven or unfair difference in wealth, power, or opportunity. In sociology and economics, it usually refers to systematic gaps between groups.
reform (noun) — what does it mean?	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.
survey (noun) — what does it mean?	A method of collecting data by asking many people questions. In sociology, economics, and psychology, it is used to measure attitudes or habits.
status (noun) — what does it mean?	A person’s position or rank within a group or society. In sociology and politics, it can affect influence and access to resources.
variable (noun) — what does it mean?	A factor that can change or take different values. In economics, psychology, and sociology, it is used in research and data analysis.
stress (noun) — what does it mean?	Physical or mental strain caused by pressure or difficulty. In psychology, it is a major topic in health and performance.
community (noun) — what does it mean?	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.
urban (adjective) — what does it mean?	Related to cities and city life. In sociology, economics, and history, it often describes population patterns and services.
social (adjective) — what does it mean?	Related to people living together in groups or to society in general. In sociology and anthropology, it is a broad term for group life.
consistent (adjective) — what does it mean?	Showing the same pattern or behavior over time. In research and statistics, it suggests reliability or regularity.
policy (noun) — what does it mean?	A plan or rule adopted by an institution or government. In politics and economics, it directs decisions and behavior.
consensus (noun) — what does it mean?	General agreement among a group. In politics and sociology, it often refers to broad support for a decision.
trade (noun) — what does it mean?	The buying, selling, or exchange of goods and services. In economics and history, it is central to markets and long-distance contact.
profit (noun) — what does it mean?	Money earned after costs are subtracted from revenue. In economics and business history, it indicates financial gain.
property (noun) — what does it mean?	A thing owned by a person, group, or government. In economics and history, it often refers to land or assets.
impact (noun) — what does it mean?	A strong effect or influence. In economics, politics, and history, it often describes the results of a policy or event.
emerge (verb) — what does it mean?	To appear, become visible, or develop over time. In history and sociology, it often describes new patterns or ideas arising.
distribution (noun) — what does it mean?	The way something is spread out among people or places. In economics and sociology, it often refers to income, resources, or population patterns.
aesthetic (adjective) — what does it mean?	Relating to beauty, style, or artistic appearance; often used when discussing how a work looks or feels.
brochure (noun) — what does it mean?	A short printed or digital booklet that presents information, usually for promotion or explanation.
curate (verb) — what does it mean?	To select, arrange, and present materials for an exhibit or collection.
faction (noun) — what does it mean?	A smaller group within a larger organization, often with different interests or opinions.
heritage (noun) — what does it mean?	Valuable traditions, buildings, objects, or customs passed down from the past.
manuscript (noun) — what does it mean?	A text written by hand or a draft prepared for publication.
motif (noun) — what does it mean?	A repeated image, idea, or design that helps unify a work.
patron (noun) — what does it mean?	A person who supports artists, writers, or institutions, often financially.
repertoire (noun) — what does it mean?	A set of works, skills, or pieces that a performer or group can present.
style (noun) — what does it mean?	A distinctive way of expressing or making something.
visualize (verb) — what does it mean?	To form a clear picture in the mind or represent something visually.
compile (verb) — what does it mean?	To collect information or pieces from different sources and arrange them together.
practical (adjective) — what does it mean?	Useful and based on real conditions, not just theory.
adjacent (adjective) — what does it mean?	Next to or sharing a boundary; used in geography and architecture.
bias (noun) — what does it mean?	A tendency that favors one side unfairly; used in research and methodology.
convince (verb) — what does it mean?	To persuade or cause to believe; used in debate and argumentation.
discrete (adjective) — what does it mean?	Separate and distinct; used in mathematics and science.
ensure (verb) — what does it mean?	To make certain; used in procedure and safety.
explicit (adjective) — what does it mean?	Stated clearly and directly; used in writing and instruction.
implement (verb) — what does it mean?	To carry out or put into effect; used in policy and management.
induce (verb) — what does it mean?	To cause or bring about; used in science and medicine.
integral (adjective) — what does it mean?	Essential or necessary as a part; used in systems and organization.

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Memly writes all of them — every meaning, usage cue and university-context example. Writing them ourselves is what lets each example sit in the discipline the word actually belongs to, instead of a generic sentence that would fit any of them.

How is this different from a general academic word list?

Cards are organized around both academic discourse and common university lecture domains, with cues for recognizing, paraphrasing and using each term in context.

Editorial method and sources

Memly's editors use the primary sources below to check scope and terminology, then independently write and review the cards.

ETS: TOEFL iBT content and structure