Part of speech:
Having a share in bringing about a result
Having a beneficial use; serviceable:
Producing a strong impression or response; striking:
The definition of essential is completely necessary or part of the basic nature of something.
The definition of influential is someone or something that has an impact on or shapes how people act or how things occur.
(Music) Of, relating to, or performed by singing:
Find another word for instrumental. In this page you can discover 19 synonyms, antonyms, idiomatic expressions, and related words for instrumental, like: partly responsible for, contributory, crucial, useful, conducive, of service, effective, helpful, necessary, assisting and essential.