κεραυνὸν ἐν γλώττῃ φέρειν → carry a thunderbolt on his tongue
Ar. and P. ἀδύνατος, πονηρός, μοχθηρός, P. and V. ἀφυής, φαῦλος, κακός, V. φλαυρουργός; see incapable.
