IS QUIET' The term 'IS QUIET' can be broken down into two words, 'IS' and 'QUIET'. The word 'IS' is a verb that is used to describe the state of being of something or someone. It is often used to describe a person's character or behavior. The word 'QUIET' is an adjective that describes a lack of sound or activity. It is often used to describe a person or place that is peaceful and tranquil. Together, the term 'IS QUIET' can be used to describe someone or something that is peaceful and tranquil, without any sound or activity.