H2786. charaq
חָרַק verb gnash or grind the teeth, only in poetry (Late Hebrew id.; Arabic file, rub together, grate or grind (teeth); Aramaic id.) —
Qal Perfect3masculine singular ׳ח [Job 16:9]; Imperfect יַחֲרֹק [Psa 112:10]; וַיַּחַרְקוּֿ [Lam 2:16]; Infinitive absolute חָרֹק [Psa 35:16]; Participle חֹרֵק [37:12]; — grind the teeth in rage against: ׳ח על שׁניו [37:12]; [35:16] absolute without על [112:10]; [Lam 2:16] (only here with שֵׁן singular); with בְּ instrumental (Ges§ 119, 3 b, R. DaSynt, § 73 R. 6) ׳ח עלֿ בשׁניו [Job 16:9].