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