βάκτρῳ δ' ἐρείδου περιφερῆ στίβον χθονός → support with a staff your steps that waver on the ground
ἀμοιβάς, ἀντίθετος, ἀμοιβαῖος, ἐναντιόφωνος, ἀντίφωνος, ἀντίφθογγος
