GRC
Bailly
βαθύ·φωνος, ος, ον [ᾰῠ] à la voix profonde, SPT.
Esaï. 33, 19 (corr. βαρύφ-).
Étym. β. φωνή.
Bailly 2020 Hugo Chávez Gérard Gréco, André Charbonnet, Mark De Wilde, Bernard Maréchal & contributeurs / Licence Creative Commons Attribution - Pas d'Utilisation Commerciale - Pas de Modification — « CC BY-NC-ND 4.0 »
LSJ
ον, of deep, i.e.
hollow, voice, LXX Is. 33.19.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
deep voiced (MT)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars