perceive – v. to notice or become aware of (something)

grammar – n. the whole system and structure of a language

precaution – n. a measure taken to prevent something dangerous from happening; a safeguard

pod – n. a self-container vehicle or other device

comedy club – n. a business where humorists perform

snore – v. to breathe noisily while sleeping

practice – n. the action of repeating an exercise in order to improve one's understanding or skills