Synonyms for peremptory
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fixed, authoritative, uncompromising; see absolute 1, comprehensive, finished 1, firm 1.
Harsh
rigorous, firm, stringent; see cruel 2, sarcastic, severe 2.
Dictatorial
overbearing, decisive, assertive; see absolute 3, autocratic 1, tyrannical.
See peremptory in Webster's New World Roget's A-Z Thesaurus II
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