Quick Definition
I grind or gnash
Strong's Definition
to grate the teeth (in pain or rage)
Derivation: a primary verb;
KJV Usage: gnash
Thayer's Greek Lexicon
βρύχω: (imperfect ἔβρυχον); to grind, gnash, with the teeth: ὀδόντας ἐπί τινα, Act_7:54 (Job_16:9; Psa_34:16 (); Psa_36:12 () for αΔΜωΐΡπΗΜιΔν ηΘψΗχ and ωΔΡπΗΜιΔν ηΘψΗχ; intransitive, without ὀδόντας (quoted in Hermippus ()) Plutarch, Pericl. 33 at the end; (Hipp. (see Liddell and Scott))). Of the same origin as βρύκω (cf. δέχω and δέκω), to bite, chew; see Hermann on Sophocles Philoct. 735;Ellendt, Sophocles' Lexicon, under the word βρύκω).
Mounce Concise Greek Dictionary
βρύχω brychō 1x
to grate or gnash the teeth, Act_7:54
Abbott-Smith Greek Lexicon
βρύχω
( Attic , βρύκω ),
[in LXX : Job_16:9 , Psa_35:16 ; Psa_37:12 ; Psa_112:10 , Lam_2:16 ( H2786 ) * ;]
1. to bite or eat greedily.
2. to gnash, grind, with the teeth: Act_7:54 .†
STEPBible — Tyndale Abridged Greek Lexicon
βρύχω (Attic, βρύκω),
[in LXX: Job.16:10(9), Psa.34 (35):16 36 (37):12 111 (112):10, La 2:16 (חרק)* ;]
__1. to bite or eat greedily.
__2. to gnash, grind, with the teeth: Act.7:54.
† (AS)