an- (1)youdaoicibaDictYouDict[an- 词源字典]
privative prefix, from Greek an-, "not, without," related to ne- and cognate with Sanskrit an-, Latin in-, Gothic and Old English un- (see un- (1)).[an- etymology, an- origin, 英语词源]
an- (2)youdaoicibaDictYouDict
form of Latin ad- before -n- (see ad-).