disillusionment
Pronunciation:
/dɪsɪˈljuʒənmənt//dɪsɪˈluʒənmənt/noun
Definitions
A feeling of disappointment, akin to depression, arising from the realization that something is not what it was expected or believed to be, possibly accompanied by philosophical angst from having one's beliefs challenged.
The act of freeing from an illusion; the state of being freed therefrom.