ἡ γὰρ σιωπὴ τοῖς σοφοῖσιν ἀπόκρισις → silence, you see, is an answer for the wise (Menander)
adj.
P. and V. οὐκ ἀνεκτός, οὐ φορητός, οὐκ ἀνασχετός (rare P.), P. ἀφόρητος, Ar. and V. οὐ τλητός, V. οὐχ ὑπόστατος, δύσοιστος, δύσφορος, ἄτλητος, ἄφερτος; see also grievous.