to endure

• 忍住剧痛

  endure excruciating pain

• 忍住眼泪

  hold back tears

• 忍住不说

  bite one's tongue

• 他忍不住了。

  He couldn't restrain himself.

• 我忍不住要说。

  I couldn't stop myself from speaking.

• 他忍不住笑了起来。

  He couldn't stop himself from bursting out in laughter.