形容词
外出就餐
1. (对某事)失望的，沮丧的，失意的
If you are disappointed, you are rather sad because something has not happened or because something is not as good as you had hoped.
2. (对某人)失望的，灰心的
If you are disappointed in someone, you are rather sad because they have not behaved as well as you expected them to.
1. disappointingly unsuccessful
e.g. disappointed expectations and thwarted ambitions
their foiled attempt to capture Calais
many frustrated poets end as pipe-smoking teachers
his best efforts were thwarted