灰心 (huī xīn): To lose heart (Adjective) — Meaning & Stroke Order

Although he didn't do well on this exam, he didn't lose heart.

Have you really become discouraged just because of one small setback?

He never lost heart because of external doubts; instead, he became even more firm in his beliefs.

Several consecutive failures made him feel disheartened, but he quickly adjusted his mindset and started over.