Word library
8,130 words, searchable by word, definition, part of speech, and CEFR level.
To think that something is likely true, without being completely certain.
To stop something from being expressed, noticed, or growing, often by force or effort.
Having authority or influence that extends beyond the borders of a single nation.
Confident that something is true, without any doubt.
Used to express confidence that something is true, or to urge agreement.
The outside or top layer of something.
A comparison of an object's surface area to its volume, which shrinks as an object gets larger and affects things like heat loss and diffusion.
The sport of riding on a wave while standing or lying on a board.
Medical treatment that involves cutting into the body to repair or remove something.
An amount left over after all needs have been met.
In economic theory, the extra value that workers produce beyond what they are paid in wages.
An unexpected event, or the feeling caused by something unexpected.
Feeling a sudden sense of shock or wonder because something you didn't expect just happened.
Causing surprise; unexpected.
To be or come to be all around something or someone.
Having something on every side.
Located around or near a particular place.
Close observation of a person or place, especially to gather information or prevent crime.
A set of questions used to gather information from a group of people.
To continue to live or exist, especially after facing danger, difficulty, or a hard situation.
To believe something to be true or likely, especially something bad, without proof.
A feeling of excited or anxious uncertainty about what will happen next.
A mixture in which small solid particles are spread through a liquid without dissolving.
To keep something going over time, or to support the weight of something.
The ability to keep something going, especially in a way that doesn't use up resources faster than they can be replaced.
Able to continue for a long time without running out or causing lasting damage, especially to the environment.
Economic and social progress that meets the needs of the present without compromising the ability of future generations to meet their own needs.
Travel and tourism managed in a way that limits harm to the environment and benefits local communities long term.
A small, fast-flying bird with a forked tail, known for migrating long distances.
An area of low, wet land that is often covered with trees and thick plants.
A large, graceful white bird with a long curved neck that lives on lakes and rivers.
To make a solemn promise, or to use offensive language.
A warm, knitted piece of clothing worn over a shirt.
To clean a surface by brushing dirt or dust away, usually with a broom.
Having the taste of sugar, or, when describing a person, kind and pleasant.
To move through water using your arms, legs, or fins.
The activity of moving through water using the arms and legs.
Clothing designed to be worn for swimming.
A seat hung from ropes or chains that a person sits on and moves back and forth.
A small device that turns electricity on or off.
A weapon with a long metal blade and a handle, used for cutting or stabbing.
A person who flatters someone powerful in order to gain an advantage.
A single unbroken sound within a word, usually built around one vowel sound.
A close, long-term relationship between two different species living together.
Describing a close relationship in which two different organisms depend on and benefit each other.
A sign, image, or object that is used to represent something else, often an idea or quality that can't be shown directly.
The use of objects, colors, or images in a piece of writing to represent deeper ideas or meanings.
Exact matching of shape or size on either side of a dividing line.