Ἐχινοῦς

From LSJ

ἢ δεῖ σιωπᾶν ἢ λέγειν τὰ καίρια → you should either keep silence or make timely remarks (Menander)

Source

Russian (Dvoretsky)

Ἐχινοῦς: οῦντος ὁ Эхинунт (город во Фтиотиде, близ Фермопил) Arph.