grit one's teeth, to

grit one's teeth

Fig. to grind or clench one's teeth together in anger or determination. I was so mad, all I could do was stand there and grit my teeth. All through the race, Sally was gritting her teeth. She was really determined.
See also: grit, teeth

grit one's teeth

Summon up one's strength to face unpleasantness or overcome a difficulty. For example, Gritting his teeth, he dove into the icy water. This expression uses grit in the sense of both clamping one's teeth together and grinding them with effort. [Late 1700s]
See also: grit, teeth

grit one's teeth, to

To summon up strength to bear pain, misfortune, or some other unpleasant matter, or determination for a difficult task. The idea of setting one’s teeth goes back to the ancient Greeks and Romans. Menander wrote, “Set your teeth and endure” (The Girl from Samos, ca. 300 b.c.). “Gritting the teeth” describes both setting or clamping them together and grinding them with the effort. In 1797 Thomas Jefferson described his colleague, “Mr. Adams . . . gritting his teeth, said . . .”
See also: grit