ατράχηλος
From LSJ
τὸ κακὸν δοκεῖν ποτ' ἐσθλὸν τῷδ' ἔμμεν' ὅτῳ φρένας θεὸς ἄγει πρὸς ἄταν → evil appears as good to him whose mind the god is leading to destruction (Sophocles, Antigone 622f.)
-η, -ο (Α ἀτράχηλος, -ον)
1. αυτός που δεν έχει τράχηλο
2. αυτός που έχει κοντό και χοντρό τράχηλο.