injustice (n.)youdaoicibaDictYouDict[injustice 词源字典]
late 14c., from Old French injustice, from Latin injustitia "injustice," from injustus "unjust, wrongful, oppressive," from in- "not" (see in- (1)) + justus "just" (see just (adj.)).[injustice etymology, injustice origin, 英语词源]
justiciaryyoudaoicibaDictYouDict
"An administrator of justice", Mid 16th century: from medieval Latin justitiarius, from Latin justitia, from justus (see just).