ἀβαρβάριστος
From LSJ
συνερκτικός γάρ ἐστι καὶ περαντικός, καὶ γνωμοτυπικὸς καὶ σαφὴς καὶ κρουστικός, καταληπτικός τ' ἄριστα τοῦ θορυβητικοῦ → he's intimidative, penetrative, aphoristically originative, clear and aggressive, and superlatively terminative of the obstreperative
English (LSJ)
ον,
A without barbarisms, Lex.Vind.294. Adv. -τως EM331.37. ἀβάρβαρος, f.l. for ἀβόρβορος, q.v.