in vain
adj1
Idiomatic Unsuccessful, failed.
- Their efforts were in vain and he succumbed to his injuries.
- The problems concerning contrast induced hyperemia and the in vain efforts to search for a contrast agent not influencing flow […]2012, N.H. Pijls, Maximal Myocardial Perfusion as a Measure of the Functional Significance of Coronary Artery Disease: