necessary or needed.

relating to something`s or someone`s basic or most important qualities.

a basic thing that you cannot live without.

one of the basic or most important ideas or qualities in something.

extremely important or necessary.

Essential also means basic to the nature of someone or something.

the basic things you need to live.

Essentials are also the basic or most important part of something.

very important or necessary.

a basic thing that you cannot live or succeed without.