adjective
dictatorial, opinionated
Synonyms: arbitrary, arrogant, assertive, bigoted, bullheaded, categorical, cocksure, confident, definite, despotic, determined, dictative, doctrinaire, domineering, downright, egotistical, emphatic, fanatical, fascistic, formal, high and mighty, imperious, intolerant, magisterial, narrow-minded, obdurate, obstinate, one-sided, overbearing, peremptory, pigheaded, prejudiced, stiff-necked, stubborn, tenacious, tyrannical, unequivocal, wrong-headed
Antonyms: amenable, doubting, flexible, indecisive, manageable, obedient, questioning, skeptical, submissive
adjective
based on absolute truth
Synonyms: a priori, as a matter of course, assertive, authoritarian, authoritative, axiomatic, by fiat, by natural law, by nature, canonical, categorical, deducible, deductive, derivable, doctrinaire, doctrinal, eternal, excathedra, formal, imperative, inevitable, on faith, oracular, orthodox, peremptory, positive, pragmatic, prophetic, reasoned, systematic, theoretical, unchangeable, unerring, unqualified
Antonyms: ambiguous, doubtful, dubious, equivocal, fluctuating, indecisive, not positive, uncertain, vacillating