Past participle of swear, typically implies a promise or an oath.

वचन देना या कसम खाना

English Usage: He had sworn to tell the truth.

Hindi Usage: उसने सच बताने का वचन दिया था।

Bound by an oath or a promise; firm in commitment.

कसम के तहत बंधा हुआ

English Usage: She is a sworn enemy of corruption.

Hindi Usage: वह भ्रष्टाचार की कट्टर दुश्मन है।