κακόγλωσσος
From LSJ
Θεὸς πέφυκεν, ὅστις οὐδὲν δρᾷ κακόν → Deus est, qui nihil admisit umquam in se mali → Es ist ein göttlich Wesen, wer nichts Schlechtes tut
English (LSJ)
ον,
A ill-tongued, βοὴ κ. a cry of misery, E.Hec.661. II bringing evil [on oneself] by one's tongue, of Niobe, Call.Del.96.