grit one's teeth

Meanings:

• 1.

  English (general)literalneutral
  • To clench or press the teeth together tightly, typically in response to pain, anger, or determination.

• 2.

  English (general)idiomaticneutral
  • To endure an unpleasant, difficult, or disagreeable situation with resolve and suppression of complaint; to brace oneself to cope.