Synonyms of imperative in English:

imperative


See definition of imperative

adjective

1‘it is imperative that you find him’

SYNONYMS
vitally important, of vital importance, all-important, vital, crucial, critical, essential, of the essence, a matter of life and death, of great consequence, necessary, indispensable, exigent, pressing, urgent
required, compulsory, mandatory, obligatory
ANTONYMS

unimportant, optional

2‘the imperative note in her voice was unmistakable’

SYNONYMS
peremptory, commanding, imperious, authoritative, masterful, lordly, magisterial, autocratic, dictatorial, domineering, overbearing, assertive, firm, insistent, bossy, high-handed, overweening
ANTONYMS

submissive