awol (adj.)youdaoicibaDictYouDict[awol 词源字典]
also a.w.o.l., military initialism (acronym) for absent without leave. The -o- seems to be there mostly so the assemblage can be pronounced as a word. In U.S. military use at least from World War II, popular use by 1960.[awol etymology, awol origin, 英语词源]