Gritted his teeth/ to gnash one's teeth at/ be angry with
To get very angry and restrain oneself so that the anger does not burst out.
("The wicked devises against the righteous and gnashes his teeth at him" — Psalms 37:12; and likewise: "His enemies gnash their teeth, for they can prevail against her, and they press her by night and by day" — Abraham Ibn Ezra, Elohei Kedem Me'onah; and likewise: "And shall we gnash our teeth and clench a fist of rage—on whose skull will it fall?" — H.N. Bialik, Davar; and likewise: "And the dawn will call in laughter's hour / and he will gnash his teeth from behind the door" — Alexander Pen, Lo Ani; and likewise: "Night after night, a cold fox gnashes his teeth / circling and circling on guard—father is not asleep" — Immanuel the Russian, Shachav Beni).
Translation
Expression (Hebrew)
חָרַק שִׁינָּיו, חָרַק שֵׁן (בְּחֵירוּק שִׁנַּיִים)
Definition (Hebrew)
כָּעַס מְאוֹד וְהִתְאַפֵּק מִלָּתֵת לְכַעֲסוֹ לִפְרֹוץ הַחוּצָה.
("זֹמֵם רָשָׁע לַצַּדִּיק וְחֹרֵק עָלָיו שִׁנָּיו"- תְּהִלִּים לז יב, וְכֵן:"וְאוֹיְבֶיהָ שֵׁן חוֹרְקִים, כִּי יָכוֹל נוּכַל לָהּ, וְלַיְלָה וְיוֹם חוֹנְקִים"- אַבְרָהָם אִבְּן עֶזְרָא/ אֱלֹהֵי קֶדֶם מְעוֹנָה, וְכֵן:"וְכִי נַחְרֹק שֵׁן וְאֶגְרוֹף זַעַם נִקְפֹּץ- עַל קָדְקֹד מִי יִנְחַת"- ח.נ. בְּיָאלִיק/ דָּבָר, וְכֵן:"וְהַשַּׁחַר בִּשְׂחוֹק עֵת יִקְרָא/ וְיַחֲרֹק שֵׁן מִבַּעַד לַדֶּלֶת"- אָלֶכְּסַנְדֶּר פֶּן/ לֹא אֲנִי, וְכֵן:"לַיְלָה לַיְלָה קַר שׁוּעָל חוֹרֵק לוֹ שֵׁן/ סוֹבֵב סוֹבֵב עַל הַמִּשְׁמָר אַבָּא אֵינוֹ יָשֵׁן"- עִמָּנוּאֵל הָרוּסִי/ שָׁכַב בְּנִי)