Definition
- C2
To become discouraged and lose the belief that one can succeed.
對成功失去信心；感到灰心喪志。
Even if progress is slow, don't lose heart; keep going.
即使進展緩慢，也不要灰心；繼續前進。
After many failed attempts, he began to lose heart.
在多次失敗的嘗試後，他開始灰心喪志。
Despite facing many challenges, they didn't lose heart but instead worked harder.
儘管面臨許多挑戰，他們並沒有灰心，反而更加努力。