vital component

noun

UK /ˈvaɪ.təl kəmˈpəʊ.nənt/

US /ˈvaɪ.təl kəmˈpoʊ.nənt/

A vital component is a part that is really needed for something to work.

The battery is a vital component of the toy car.

SYNONYMS

essential part key piece necessary element crucial part

RELATED WORDS

component ingredient element building block

OTHER MEANINGS

2. A part that keeps a machine or system running safely.

The brakes are a vital component of a bicycle.

3. An important piece of a plan or idea.

Trust is a vital component of a good friendship.

4. A main part of a living thing that keeps it healthy.

The heart is a vital component of the body.