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
