From Proto-Indo-European causative o-grade *nokeyo- of *neḱ- (“perish, disappear”); see also Welsh angeu (“death”), Breton ankou, Old Irish ec, Latin noxius (“harmful”), Latin nex (“murder, violent death”) (as opposed to mors), Ancient Greek νεκρός (nekrós, “dead”), Old Persian [script?] (vi-nathayatiy, “he injures”), Avestan [script?] (nasiieiti, “disappears”), [script?] (nasu-, “corpse”), Sanskrit नश्यति (naśyati, “disappear, perish”).
- The injury caused may be physical or emotional.
- Requires the object be in the dative case.
- In practice, the only passive forms met with in Latin are the third-person singular forms.