Word library
8,130 words, searchable by word, definition, part of speech, and CEFR level.
A length of time with a particular start and end.
Happening repeatedly at regular intervals of time.
The principle that the properties of elements repeat in a regular pattern when they are arranged in order of increasing atomic number.
A chart that arranges all the known chemical elements by their atomic number and properties.
Relating to the outer edge or edges of something, or of minor importance.
The outer edge or boundary of an area, or a marginal, less central position in a group or system.
The wave-like muscle contractions that push food along the digestive tract.
A small plant with pale blue-purple flowers, or the soft blue-purple color named after it.
Lasting forever or for a very long time, without any plan to change.
The degree to which a material allows liquids, gases or other substances to pass through it.
Allowing liquids or gases to pass through.
To spread through and become part of every part of something.
Official or formal agreement that allows someone to do something.
To allow something to happen or someone to do something.
One possible arrangement of a set of items in a particular order.
Having a harmful effect, especially in a gradual or hard-to-notice way.
Continuing forever or for a very long time without stopping.
To confuse or puzzle someone.
Cruel or unfair treatment of a person or group over a long period, often because of their beliefs or identity.
The ability to keep trying despite difficulty or repeated failure.
To continue doing something despite difficulty or opposition, or to continue existing over time.
The quality of continuing to try to do something despite difficulty or opposition.
A human being, considered as an individual.
Belonging to or affecting a particular person; private.
The set of qualities that make up a person's distinctive character.
From your own point of view, or in person rather than through someone else.
Giving human qualities or actions to something that isn't human, such as an animal, object, or idea.
The people employed by an organization, or the department that manages them.
A particular way of thinking about or looking at something, often shaped by someone's experience.
Having a sharp understanding and good judgment about people or situations.
The quality of having sharp judgment and understanding.
To cause someone to do or believe something through reasoning or argument.
A piece of writing that presents arguments and evidence intended to convince the reader to accept a particular viewpoint.
Confidently and cheerfully bold, sometimes slightly disrespectful.
Holding firmly to an opinion or course of action, even when it's inconvenient.
Directly relevant to the matter being discussed.
A careful reading or examination of something.
Present or spreading throughout every part of something.
Rock that allows water to soak through it, often because it is porous or full of small cracks.
Expecting the worst outcome and focusing on the negative side of things.
An animal that people keep at home for company.
One of the thin, colored parts that make up a flower.
A formal written request, usually signed by many people, asking an authority to take a particular action.
Childish irritability or sulkiness over small things.
A numerical scale, running from zero to fourteen, used to measure how acidic or alkaline a solution is.
A group of people or things arranged closely together, especially for a common purpose.
A ruler of ancient Egypt.
A shop where medicines are prepared and sold.