but

however

लेकिन

English Usage: I wanted to go to the party, but I was too tired.

Hindi Usage: मैं पार्टी में जाना चाहता था, लेकिन मैं बहुत थका हुआ था।

on the other hand

हालांकि

English Usage: She was excited about the trip, however, it got canceled.

Hindi Usage: वह यात्रा के लिए उत्साहित थी, हालांकि, यह रद्द हो गई।

nonetheless

फिर भी

English Usage: The weather was bad; nonetheless, we went for a hike.

Hindi Usage: मौसम खराब था; फिर भी, हम ट्रैकिंग पर गए।