Ancient Greek αἴτιος

← Avestan 𐬀𐬉𐬙𐬀 (cognate)

← Ancient Greek *αἶτος (affix)

← Ancient Greek -ιος (affix)

← Proto-Indo-European (derived)

← Proto-Indo-European *h₂ey- (mention)

→ Greek αίτιος (inherited)

→ Ancient Greek αἰτέω (mention)

→ Ancient Greek οἶτος (mention)

→ Ancient Greek παραίτιος (affix)