ἀλλά Conjunct., properly neut. pl. of ἄλλος (with changed accent)
otherwise, but, stronger than δέ:
I.to oppose single clauses, but, Lat. autem, the preceding clause being negat., οὐ μόνον ἅπαξ, ἀλλὰ πολλάκις Plat.; so, οὐχ (or μὴ) ὅτι, οὐχ (or μὴ) ὅπως, are followed by ἀλλά or ἀλλά καὶ . . . , not only . . . , but . . .