equivocal (adj.)youdaoicibaDictYouDict[equivocal 词源字典]
c. 1600, from Late Latin aequivocus "of equal voice, of equal significance, ambiguous" (see equivocation) + -al (1). Earlier in same sense was equivoque (late 14c.). Related: Equivocally (1570s).[equivocal etymology, equivocal origin, 英语词源]