frivolous

1. ADJ If you describe someone as frivolous, you mean they behave in a silly or light-hearted way, rather than being serious and sensible. 轻率的

I just decided I was a bit too frivolous to be a doctor. 我只是认定自己有点儿太轻率，不适合当医生。

2. ADJ If you describe an activity as frivolous, you disapprove of it because it is not useful and wastes time or money. 无用的[表不满]

The group says it wants politicians to stop wasting public money on what it believes are frivolous projects. 该团体说他们希望政客们停止在该团体认为无用的项目上浪费公款。