σιγῇ
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 (Woodhouse)
silently, in a low voice, in a whisper, in silence, unknown to, without the knowledge of