Word library
8,130 words, searchable by word, definition, part of speech, and CEFR level.
A branch of mathematics that uses letters and symbols to represent numbers and express relationships between them.
Small physical or virtual shapes used to represent numbers and variables so students can build and visualise algebraic expressions.
A mathematical phrase that combines numbers, variables, and operations without an equals sign.
A fraction in which the numerator, the denominator, or both contain algebraic expressions rather than just numbers.
A set of step-by-step instructions followed to solve a problem or complete a task.
A false or additional name used by someone, often to hide their real identity.
A being from another planet, or, in legal terms, a person who is not a citizen of the country they live in.
To cause someone to feel isolated or unwelcome, often by treating them unfairly or differently.
On fire, or lit up brightly.
The correct or agreed positioning of things in relation to one another, or agreement between people or groups.
Similar to each other in appearance or character.
Relating to food, nutrition, or digestion.
Living, not dead.
A substance that dissolves in water to form a solution with a pH greater than seven.
Having a pH above seven, the chemical opposite of acidic.
The whole amount of something, or every one of a group.
Acceptable, satisfactory, or in good health or condition.
To make a fear, doubt, or worry less intense.
A claim that someone has done something wrong, made without proof yet.
To claim that something is true, without yet offering proof.
Loyal support for a country, leader, group, or cause.
A story, poem, or picture in which the characters and events stand for a deeper moral or political meaning.
One of two or more alternative forms of a gene that can occupy the same position on a chromosome.
A substance that triggers an allergic reaction in some people.
A condition in which the body reacts badly to a normally harmless substance, such as pollen or certain foods.
To make a problem, pain, or difficulty less severe, without necessarily solving it completely.
A formal agreement or partnership between two or more countries, groups, or people who work together for a shared purpose.
A network of agreements between countries promising mutual support, especially military support, if one member is attacked.
A large reptile with a long body, short legs, and powerful jaws, found mainly in rivers and swamps in the Americas.
The repetition of the same consonant sound at the start of several nearby words.
To give a certain amount of something, such as money or time, to a particular purpose.
One of two or more different physical forms that the same element can take.
To let someone do something, or to say that something is permitted.
A fixed amount of money given regularly, often to a child or an employee for expenses.
A metal made by melting and combining two or more metals, or a metal with another element, to create a material with different properties.
To mention something in an indirect way, without stating it directly.
A brief, indirect reference to another work, person, or event that a writer expects the reader to recognize.
Made up of sand, mud, or other material deposited by flowing water, usually a river.
A book published every year with information such as weather predictions, dates, and useful facts.
Very nearly, but not completely.
Up in the air or high above the ground.
Not with any other people, by yourself.
Following the length or direction of something, such as a road or river.
Distant and not friendly, keeping apart from others.
In a voice loud enough to be heard, rather than silently.
A smaller relative of the llama, raised mainly for its soft wool.
The set of letters used to write a language, arranged in a fixed order.
A well-known song that helps children learn the order of the letters of the alphabet.