ambiguousyoudaoicibaDictYouDict
ambiguous: [16] Ambiguous carries the etymological notion of ‘wandering around uncertainly’. It comes ultimately from the Latin compound verb ambigere, which was formed from the prefix ambi- (as in AMBIDEXTROUS) and the verb agere ‘drive, lead’ (a prodigious source of English words, including act and agent). From the verb was derived the adjective ambiguus, which was borrowed directly into English. The first to use it seems to have been Sir Thomas More: ‘if it were now doubtful and ambiguous whether the church of Christ were in the right rule of doctrine or not’ A dialogue concerning heresies 1528.
=> act, agent
ambiguity (n.)youdaoicibaDictYouDict
c. 1400, "uncertainty, doubt, indecision, hesitation," also from Medieval Latin ambiguitatem (nominative ambiguitas) "double meaning, equivocalness, double sense," noun of state from ambiguus (see ambiguous).
ambiguous (adj.)youdaoicibaDictYouDict
1520s, from Latin ambiguus "having double meaning, shifting, changeable, doubtful," adjective derived from ambigere "to dispute about," literally "to wander," from ambi- "about" (see ambi-) + agere "drive, lead, act" (see act). Sir Thomas More (1528) seems to have first used it in English, but ambiguity dates back to c. 1400. Related: Ambiguously; ambiguousness.