en vano, inútilmente

listen to the pronunciation of en vano, inútilmente
الأسبانية - الإنجليزية
in vain
Without success; ending in failure

On the mountains of truth you can never climb in vain.

In a disrespectful manner, especially when concerning religion

Thou shalt not take the name of the LORD thy God in vain.

to no avail; "he looked for her in vain"; "the city fathers tried vainly to find a solution"
all for nothing