

Он скрежетал зубами от злости, но промолчал.
He ground his teeth in anger but said nothing.
Во сне муж часто скрежещет зубами, и я просыпаюсь.
My husband often grinds his teeth in his sleep, and it wakes me up.
Хватит скрежетать зубами, лучше скажи, что тебя так бесит.
Stop grinding your teeth and just tell me what's making you so mad.
"скрежетать" is in the lesson "Emotions" (Level 19), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.