indignant (adj.)youdaoicibaDictYouDict[indignant 词源字典]
1580s, from Latin indignantem (nominative indignans) "impatient, reluctant, indignant," present participle of indignari "to be displeased at, be indignant" (see indignation). Related: Indignantly.[indignant etymology, indignant origin, 英语词源]