kuvvet veya enerjinin azalması

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Турецкий язык - Английский Язык
letdown
Disappointment, the sad state of not living up to expectations

It's such a letdown, I thought it was going to be better than this.

an event, performance etc that is not as good as you expected it to be = disappointment
{i} disappointment, discouragement, feeling of depression; decrease, reduction
a feeling of dissatisfaction that results when your expectations are not realized; "his hopes were so high he was doomed to disappointment"