Loyal or faithful, especially to a particular cause or leader.

निष्ठावान

English Usage: The allegiant followers rallied around their leader during the election.

Hindi Usage: निष्ठावान अनुयायी चुनाव के दौरान अपने नेता के चारों ओर इकट्ठा हो गए।

Showing allegiance; dedicated and committed.

मातृभक्ति दिखाना

English Usage: She was allegiant to her principles, never wavering in her beliefs.

Hindi Usage: वह अपने सिद्धांतों के प्रति निष्ठावान थी, अपने विश्वास में कभी भी डगमगाई नहीं।