βρυγ-μός · bryg-mos — LSJ
biting, Nic. Th. 716 (pl., v.l. βρυχμός); gobbling, Eup. 347; chattering, shivering, Hp. Vict. 3.84, Steril. 214, Euryphon ap. Gal. 17(1).888; β. ὀδόντων gnashing of teeth, Ev.Matt. 8.12, al.
roaring of a lion, LXX Pr. 19.12.