auxiliary (adj.)youdaoicibaDictYouDict[auxiliary 词源字典]
c. 1600, from Latin auxiliaris "helpful," from auxilium "aid, help, support," related to auctus, past participle of augere "to increase" (see augment).[auxiliary etymology, auxiliary origin, 英语词源]
auxiliary (n.)youdaoicibaDictYouDict
"foreign troops in service of a nation at war," c. 1600, from auxiliary (adj.). Related: Auxiliaries.