groups of people or organizations that oppose or fight against an authority or system

प्रतिरोध समूह (Pratirodh samuh)

English Usage: Resistance groups played a crucial role in the fight against the oppressive regime.

Hindi Usage: प्रतिरोध समूह ने दमन कारी शासन के खिलाफ लड़ाई में महत्वपूर्ण भूमिका निभाई।