disappointed
The German word 'enttäuscht' is the past participle of the verb 'enttäuschen', which means 'to disappoint'. It is used to describe a feeling of sadness or dissatisfaction that arises when one's hopes or expectations are not met. For example, one might say 'Ich bin enttäuscht von meinem Freund', which means 'I am disappointed with my friend'.
I am very disappointed in you.
This phrase is often used to express strong disappointment in someone's actions. In this case, 'von dir' (in you) shows the person toward whom the disappointment is directed.
He is disappointed because he did not pass the exam.
This sentence is a common way of using the word 'enttäuscht' to describe someone's feelings, here because 'er die Prüfung nicht bestanden hat' - he did not pass the exam.
She feels disappointed after the decision.
In this phrase, 'nach der Entscheidung' (after the decision) depicts the cause of the disappointment, while 'Sie fühlt sich enttäuscht' indicates the person feeling disappointed.