へこたれる

ichidan verb, intransitive verb

lose heart; be discouraged; be exhausted

Colloquial intransitive verb for becoming mentally or physically worn down, often in the face of difficulty or fatigue. Covers both emotional dejection and physical exhaustion.

• 失しっ敗ぱいしてもへこたれずに頑がん張ばろう。

  Let's keep going without getting discouraged even if we fail.

• 暑あつさにへこたれて、外そとに出でられなかった。

  I was so exhausted by the heat that I couldn't go outside.