C1 noun /ˌdɪs.ɪˈluː.ʒən.mənt/
disillusionment
幻灭
Meaning
A feeling of disappointment resulting from the discovery that something is not as good as one believed it to be.
Example
Many people experience disillusionment after unrealistic expectations.
许多人在不切实际的期望后会经历幻灭。