Dictionary entry

φθέγγομαι

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

φθέγγομαι

[in LXX for ענה, נבע hi., etc.;]

of men or animals, to utter a sound or voice: absol., Ac 4:18; seq. ἐν φωνῇ, II Pe 2:16; c. acc., ὑπέρογκα, ib. 18.†