An action or endeavor likely to fail; a task that is futile.

A pointless or nonsensical pursuit.

निरर्थक प्रयास

English Usage: "Chasing after those who don't appreciate you is a fool's errand."

Hindi Usage: "उनका पीछा करना जो आपकी कद्र नहीं करते, यह एक निरर्थक प्रयास है।"