| Word | Definitions | Synonyms |
|---|---|---|
| essential | (adjective) basic and fundamental | - |
| (adjective) defining rights and duties as opposed to giving the rules by which rights and duties are established | Synonyms: substantive | |
| (adjective) being or relating to or containing the essence of a plant etc | - | |
| (adjective) of the greatest importance | Synonyms: all-important, all important, crucial, of the essence | |
| (adjective) absolutely necessary; vitally necessary | Synonyms: indispensable |