失望する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 失望する | 失望しない |
| Polite | 失望します | 失望しません |
| Past polite | 失望しました | 失望しませんでした |
| Past | 失望した | 失望しなかった |
| Te-form | 失望して | 失望しないで |
| Desire | 失望したい | 失望したくない |
| Potential | 失望できる | 失望できない |
| Passive | 失望される | 失望されない |
| Causative | 失望させる | 失望させない |
| Causative passive | 失望させられる | 失望させられない |
| Volitional | 失望しよう | |
| Polite volitional | 失望しましょう | |
| Imperative | 失望しろ | 失望するな |
| Conditional | 失望すれば | 失望しなければ |
| Tara conditional | 失望したら | 失望しなかったら |
noun, noun or participle which takes 'suru', intransitive verb
A strong feeling of being let down when hopes or expectations are not met. Often used with する to mean 'to be disappointed'.
I was disappointed by his attitude.
I felt deep disappointment when I saw the results.
I was disappointed by his irresponsible attitude.
I was disappointed by the exam results.
The coach couldn't hide his disappointment at the player's performance.
She felt deep disappointment at her friend's betrayal.