vains

Tous les efforts du docteur furent vains et l'homme mourut rapidement.

All the doctor's efforts were in vain, and the man quickly died.

Tous leurs efforts furent vains.

All their efforts were in vain.

Mais nos deux souhaits resteront vains.

But our two wishes will remain in vain.

— La Légende de Baahubali : 1ère Partie (2015)

Je suis content de constater que nos efforts n'ont pas été vains.

I’m pleased to see that our efforts weren’t in vain.

Tous leurs efforts étaient vains.

All their efforts were in vain.