1784, from un- (1) "not" + equivocal. Related: Unequivocally.
an unequivocal promise
an unequivocal (or univocal) statement
unequivocal evidence
an unequivocal success
took an unequivocal position
un-English
unenlightened
unenthusiastic
unenviable
unequal
unequivocal
unerring
UNESCO
unethical
uneven
uneventful