in vain
idiomPart ofvain
in vain — idiom
1. Without achieving the result that was hoped for, despite putting in effort.
1.idiom
Definition
Without achieving the result that was hoped for, despite putting in effort.
Example
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.