ἀποστάνομαι
From LSJ
ἢ δεῖ σιωπᾶν ἢ λέγειν τὰ καίρια → you should either keep silence or make timely remarks (Menander)
English (LSJ)
A = ἀφίσταμαι, PGen.53.21 (iv A.D.).
Spanish (DGE)
apartarse de καὶ οὐκ ἀποστάνομαί σου ὡς πρῶτον PAbinn.36.21 (IV d.C.).