noun - a substance or material that allows electricity to pass through it under some conditions but not under others, used especially in electronic devices
adjective, formal - matching something in size, degree, or importance; appropriate in relation to something else
noun, technical - a serious mental condition in which a person gradually loses the ability to think, remember, and behave normally, usually because of disease or old age
verb - to make something (like an idea, belief, or behavior) a natural part of the way you think or behave
noun - the process by which something becomes fossilized; often used literally for bones or plants turning into fossils, or metaphorically for ideas or behaviors becoming fixed and unchanging
noun - a method of learning a language (or experiencing a culture) by being completely surrounded by it, without using your native language
adjective - based on feelings or instinct, not on reasoning or evidence
noun - the ability to do something well or effectively
adjective - related to skills that involve understanding language, such as listening and reading, but not producing it
adjective - willing to listen to new ideas or accept suggestions
verb - to spread an idea, story, or information, especially if it is false or not very valuable
verb - to sell illegal or harmful goods such as drugs