συνεπηχέω

A. join in singing, join in a chorus, ἐξῆρχε παιᾶνα, οἱ δὲ πάντες συνεπήχησαν X. Cyr. 3.3.58, cf. 7.1.25; κορυφαίου κατάρξαντος ς. πᾶς ὁ χορός Arist. Mu. 399a15; συνεπήχουν πρὸς τὸ ἐνδόσιμον Max.Tyr. 7.7: metaph., chime in with, Ph. 1.321, Plu. 2.44c, Them. Or. 18.218a.

II. re-echo, οἶκος Luc. Dom. 3, cf. J. AJ 12.9.4, D.C. 66.22.

III. Pass., to be sounded at the same time, τῶν ἡμιφώνων τι ‐εφηχεῖται (sic) Phld. Po. 2.16.