Word library
8,130 words, searchable by word, definition, part of speech, and CEFR level.
Relating to trade or commerce.
An economic theory, common in early modern Europe, that a nation's wealth depends on maximizing exports and accumulating gold and silver.
A soldier who fights for pay rather than out of loyalty to a country or cause.
A person who buys and sells goods, especially in large quantities.
Changing mood or behavior quickly and unpredictably.
Kindness shown toward someone who could rightfully be punished or treated harshly.
Appearing attractive or valuable on the surface but actually having little real worth.
An imaginary line running from the North Pole to the South Pole, used to measure longitude.
The quality of deserving praise, reward, or attention, based on ability or worth rather than other factors.
A round platform with model horses or seats that turns while people ride on it, usually found at fairs.
An isolated hill with steep sides and a flat top, larger than a butte.
The layer of the earth's atmosphere above the stratosphere, where most meteors burn up.
A dirty or untidy state, or a confused or difficult situation.
A short piece of information sent from one person to another.
Untidy, with things left in disorder.
A person of mixed European and Indigenous American ancestry, especially in Latin America.
The chemical processes in the body that convert food into energy and maintain life.
A hard, shiny material, such as iron or gold, that usually conducts heat and electricity.
The attraction between positively charged metal ions and a surrounding sea of shared, freely moving electrons.
Describes rock that has been transformed by intense heat and pressure deep inside the earth.
The process by which rock changes into a different type of rock through intense heat, pressure, or chemical activity, without fully melting.
A complete change in form or nature, especially the biological process by which an animal such as a caterpillar becomes a very different adult.
A way of describing something by calling it another thing entirely, to suggest they share a quality.
Based on or using a metaphor, meaning something is understood symbolically rather than literally.
The branch of philosophy that examines the fundamental nature of reality, including existence, time, and causation.
A piece of rock or dust from space that burns up as it enters Earth's atmosphere, seen as a streak of light.
A piece of rock or metal from space that has landed on the surface of a planet, especially Earth.
The scientific study of weather and the atmosphere.
The rhythmic pattern of stressed and unstressed syllables in a line of poetry.
A particular way of doing something, often following a set of clear steps.
Extremely careful and precise about every small detail.
A figure of speech in which something is referred to by the name of something closely associated with it.
A metric unit of length equal to one hundred centimetres.
A system of measurement based on units of ten, including the metre, litre and gram.
A living thing so small it can only be seen with a microscope, such as a bacterium or virus.
Relating to microbes, the tiny organisms such as bacteria that can only be seen through a microscope.
The scientific study of microorganisms such as bacteria, viruses, and fungi.
The community of microorganisms, such as bacteria, that live in a particular environment, especially inside the human body.
The climate of a small, specific area that differs from the climate around it.
The branch of economics that studies the decisions of individual people, households, and businesses, rather than the economy as a whole.
A living thing so small it can only be seen with a microscope, such as bacteria.
A device that picks up sound and turns it into an electrical signal, often used for recording or amplifying a voice.
An instrument used to make very small objects look larger so they can be studied.
Tiny finger-like projections on the surface of some cells that increase the surface area available for absorption.
A kitchen appliance that heats or cooks food quickly using electromagnetic waves.
The point or part of something that is at an equal distance from its edges or ends.
Twelve o'clock at night, the middle point between one day and the next.
The point exactly halfway between two other points.