in vain
成語所屬單字vain
in vain — 慣用語
1. Without achieving the result that was hoped for, despite putting in effort.
1.慣用語
釋義
徒然；無結果
Without achieving the result that was hoped for, despite putting in effort.
例句
The technicians tried in vain to restart the server before the deadline expired.
She felt that all her years of training were in vain after she lost the final match by one point.