C1 noun /ˌdɪs.ɪˈluː.ʒən.mənt/
disillusionment
desilusión
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.
Muchas personas experimentan desilusión después de expectativas poco realistas.