Akademik

letdown
noun
a feeling of dissatisfaction that results when your expectations are not realized (Freq. 1)
-

his hopes were so high he was doomed to disappointment

Syn: ↑disappointment
Derivationally related forms: ↑let down, ↑disappoint (for: ↑disappointment)
Hypernyms: ↑dissatisfaction
Hyponyms: ↑frustration, ↑defeat

Useful english dictionary. 2012.