From Proto-Celtic*ankus, from Proto-Indo-European*neḱ-(“perish, disappear”); see also Breton ankou, Old Irish éc, Latin nex(“violent death”), noxius(“harmful”), noceō(“I hurt, harm”), Ancient Greek νέκυς(nékus, “corpse”), Old Persian 𐎻𐎴𐎰𐎹𐎫𐎹(vi-nathayatiy, “he injures”), Avestan 𐬥𐬀𐬯𐬌𐬌𐬈𐬌𐬙𐬌(nasiieiti, “disappears”), 𐬥𐬀𐬯𐬎(nasu, “corpse”), Sanskrit नश्यति(naśyati, “disappear, perish”).