crucial

crucial

adjective

Definition of CRUCIAL

of the greatest possible importance <water is crucial to our survival>

Synonyms critical, key, pivotal, vital

Related Words decisive, life-and-death (also life-or-death), weighty; basic, elementary, fundamental; essential, indispensable, necessary, requisite; pressing, urgent

Near Antonyms inconsequential, insignificant, minor, trivial, unimportant