Abbott-Smith Manual Greek Lexicon
ἐξ-ηχέω (G1837)
1 † ἐξ-ηχέω , -ῶ [in LXX: Jl 3 (4):14 ( הָמוֹן ), Si 40:13 , III Mac 3:2 * ;] to sound forth (as a trumpet, or thunder; v. M, Th. , l.c.): pass., I Th 1:8 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain