pflichtvergessen
From LSJ
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
German > Latin
pflichtvergessen, immemor officii (der Pflicht uneingedenk). – perfĭdus (treulos). – impius (gewissenlos gegen Gott, Eltern etc.). – Pflichtvergessenheit, perfidia (Treulosigkeit). – impietas (Gewissenlosigkeit gegen Gott, Eltern etc.).