Word library
8,130 words, searchable by word, definition, part of speech, and CEFR level.
The way in which two or more people or things are connected, or feel about and behave toward each other.
A member of your family.
The average mass of the atoms of an element, taking into account the proportions of its different isotopes, compared with one twelfth the mass of a carbon-12 atom.
A clause that gives more information about a noun, usually introduced by a word like 'who', 'which', or 'that'.
The movement of an object as measured from a particular point of view, rather than from a fixed, absolute position.
The view that truth, morality, or knowledge are not absolute but depend on the perspective of the person, culture, or period involved.
Einstein's theory describing how measurements of space, time and motion depend on the observer's frame of reference.
To become or make less tense, worried, or stiff.
Feeling calm and free from worry or tension.
A race in which team members take turns covering part of the distance.
To let something or someone go free, or to make something available to the public.
To assign someone or something to a lower rank or less important position.
Continuing without stopping or slowing down, especially in a determined or harsh way.
The quality of being closely connected to the matter being discussed or considered.
Closely connected to the subject being discussed or considered.
Able to be trusted to do what is expected, consistently.
A narrator whose account of events the reader can trust as accurate and honest.
A feeling of comfort after something stressful, painful, or worrying has ended or eased.
Rainfall that occurs when moist air is forced to rise over high ground, cool, and condense.
A system of belief and worship, often centered on a god or gods.
Relating to religion or belief in a god, or very devoted to a practice.
To greatly enjoy an experience or activity.
Not willing to do something, and hesitating before doing it.
To depend on someone or something with trust or confidence.
To stay in the same place or condition, or to continue to exist.
The part that is left over, especially the number left after division.
The parts of something that are left after the rest has gone, been used, or destroyed.
To make a comment or observation, often casually.
Unusual or impressive enough to be worth noticing or talking about.
To a surprising or extraordinary degree.
Intended to correct or improve a skill or problem, especially in learning.
Something that solves a problem or cures an illness.
To keep something in your mind or bring it back to mind.
To cause someone to remember something or think of something.
Failing to give something proper care or attention; negligent.
A small remaining piece or amount of something that once was larger or more complete.
Far away from other places, or distant in a relationship or connection.
To take something away from a place or position.
A period of renewed growth and creativity in art, learning, or culture, or a revival of interest in something.
To cause something to become a certain state, or to provide a service, or to represent something in art or performance.
Able to be replaced naturally and not likely to run out, such as sunlight or wind.
Energy that comes from natural sources that are not used up when used, such as sunlight, wind, or water.
A natural resource that can be replaced or replenished naturally within a reasonably short amount of time.
To repair and improve a building so it is in good condition again.
The state of being widely known and admired for an achievement or quality.
A regular payment made for the use of property, land, or equipment owned by someone else.
The formal act of giving up a right, claim, or belief.
To fix something that is broken or damaged.