ὑπήχησις

From LSJ

ἐὰν ταῖς γλώσσαις τῶν ἀνθρώπων λαλῶ καὶ τῶν ἀγγέλων, ἀγάπην δὲ μὴ ἔχω, γέγονα χαλκὸς ἠχῶν ἢ κύμβαλον ἀλαλάζον → though I speak with the tongues of men and of angels and have not charity I am become as sounding brass or a tinkling cymbal

Source

Greek (Liddell-Scott)

ὑπήχησις: -εως, ἡ, ἀπήχησις εἰς ἀπάντησιν, ἀντήχησις, Γρηγ. Νύσσ. τ. 2, σ. 890C.