Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Hellenic *ə- Ancient Greek ἀ- (a-)der. English a- Proto-Indo-European *meh₁-der. Proto-Italic *mōs Latin mōs Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālis Latin mōrālis Old French moralbor. Middle English moral English moral English amoral From a- (“not”) + moral.