abstinent (adj.)youdaoicibaDictYouDict[abstinent 词源字典]
late 14c., from Old French abstinent (earlier astenant) "moderate, abstemious, modest," from Latin abstinentem (nominative abstinens) "temperate, moderate," present participle of abstinere "to refrain from" (see abstain).[abstinent etymology, abstinent origin, 英语词源]