neededpart

noun
UK /ˈniːdɪd pɑːt/
US /ˈniːdɪd pɑːrt/

A needed part is a piece that you must have to make something work.

The wheel is a needed part of the bicycle.


OTHER MEANINGS

2. A spare piece kept ready because it is often required.

He ordered a needed part for the broken pump.

3. The specific item someone is missing to finish a job.

The mechanic waited for the needed part to arrive.

4. A key element that a plan or machine cannot do without.

Trust is a needed part of any good team.