Word library
8,130 words, searchable by word, definition, part of speech, and CEFR level.
A newly created word or expression.
Relating to newborn babies, especially during the first four weeks after birth.
A person who is new to a subject, skill, or activity.
The son of your brother or sister.
A formula that relates the voltage of an electrochemical cell to the concentrations of the substances involved in its reaction.
A fiber that carries signals between the brain and the body, or courage, or, informally, rude boldness.
An electrical signal that travels along a nerve cell, carrying information to and from the brain and body.
Feeling worried or a little afraid about something that is about to happen.
A structure that a bird builds, usually from twigs, to lay its eggs in.
A material made of crossed threads or ropes with open spaces, used to catch things or mark a boundary.
The single overall force acting on an object once all the individual forces on it have been combined.
A chemical equation that shows only the ions and molecules that actually take part in a reaction, leaving out any that remain unchanged.
A group of connected people, computers, or systems that interact or exchange things with one another.
A computing system loosely inspired by the brain, made of connected layers of simple units that learn patterns from data.
A single nerve cell that transmits electrical and chemical signals through the nervous system.
The brain's ability to reorganize itself and form new connections, especially in response to learning or injury.
The scientific study of the brain and the rest of the nervous system.
Not supporting either side in a disagreement or conflict.
A place or position that does not favor either side in a dispute.
A particle inside the nucleus of an atom that has no electrical charge.
At no time, not ever.
In spite of what was just said; even so.
Made, bought, or experienced very recently.
Information about recent events, especially as reported in the media.
A printed publication issued regularly that reports news.
Three fundamental rules describing the relationship between a body's motion and the forces acting on it, established by Isaac Newton.
Coming immediately after the current one in a series or in time.
In a position directly beside something.
Pleasant, kind, or enjoyable.
The particular role or position a living thing has within its environment, or a specialised position suited to a person or product.
The daughter of your brother or sister.
The time of day when it is dark, between sunset and sunrise.
A frightening dream, or an extremely unpleasant experience.
The view that life has no inherent meaning or purpose, and that established moral and religious values have no real foundation.
Reflecting the belief that life has no inherent meaning or that established values are without foundation.
The number after eight and before ten.
The number after eighteen and before twenty.
The number equal to nine tens.
A colorless gas that makes up most of the earth's atmosphere.
The natural process by which nitrogen moves between the atmosphere, soil and living organisms in different chemical forms.
Used to refuse, disagree, or say that something is not true.
Not a single person; nobody.
Having or showing high moral principles, or belonging to the aristocracy by birth.
Any of a group of chemical elements, such as helium and neon, that rarely react with other elements because their outer electron shell is already full.
Not a single person; no one.
Active at night rather than during the day.
To move your head up and down, usually to show agreement or greeting.
A sound, especially one that is loud or unpleasant.