sing in answer; in answer to
Ancient Greek word, found 20 times in the texts on Socratos.
Apollonius Rhodius, Argonautica 2.828: ἀθρόοι ἀντιάχησαν. ὀρέξατο δʼ αἶψʼ ὀλοοῖο
Theocritus, Ἐπιγράμματα 4.11: ξουθαὶ δʼ ἀδονίδες μινυρίσμασιν ἀνταχεῦσι
Euripides, Alcestis 423: πάρεστε καὶ μένοντες ἀντηχήσατε
All forms of ἀντηχέω