κυματοαγής
From LSJ
ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
English (LSJ)
ές, (ἄγνυμι)
A breaking like waves, ἆται S.OC1243 (lyr.).
German (Pape)
[Seite 1530] ές, Wogen brechend, bei Soph. O. C. 1245 ch. δειναὶ κυματοαγεῖς ἆται, das wie Wogen anstürmende u. sich brechende, brandende Unheil.