Demoralization is what happens when people’s courage or confidence is worn down until they do not want to try. A team after many losses, a class after a harsh teacher, workers who no longer believe the job can go well — that heavy, emptied-out feeling is demoralization. The noun names both the process and the state: “the demoralization of the staff.” It is a serious, rather formal word; in everyday talk people say “everyone’s lost heart” or “morale is terrible.” American spelling uses -ization; British writing often uses demoralisation. Though actually, an older use was about spoiling someone’s sense of right and wrong, but almost nobody means that now. Today it is about spirit, not about being a bad person.

士氣崩潰、打擊士氣（指信心被掏空，不是「道德敗壞」）