unequivocal
adjective
the report's advice was unequivocal:
unambiguous, unmistakable, indisputable, incontrovertible, indubitable, undeniable;
clear, clear-cut, crystal clear, plain, well defined, explicit, specific, unqualified, unreserved, categorical, outright, downright, direct, straightforward, blunt, outspoken, candid, point-blank, straight from the shoulder, black and white, positive, certain, decisive, emphatic, absolute, manifest, distinct.
▷antonyms equivocal, ambiguous, vague.
unequivocal Oxford Dictionary of English