ἐπιβλαβής
From LSJ
ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
English (LSJ)
ές,
A hurtful, Aret.CD1.2; τῇ ψυχῇ Hierocl.in CA13p.448M.; τὸ ἐ. Procl.Par.Ptol.166. Adv. -βῶς Poll.5.135.
German (Pape)
[Seite 929] ές, schädlich, Schol. Il. 5, 880 u. Sp. – Adv., Poll. 5, 135.