imperative
im-per-a-tive
adjective
Relating to a verb form expressing a command or instruction.
"'Go!' is an imperative verb."
noun
An essential or urgent thing; a crucial duty or requirement.
"Safety is a moral imperative for all."
adjective
Extremely important or urgent; requiring immediate attention or action.
"It is imperative that we act now."
Thesaurus
Synonyms: imperative verb, adjuratory, desperate, exigent, crying, clamant, strident, urgent, shrill, pressing, insistent, peremptory
Antonyms: beseeching, imploring, pleading