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Obligation

/ˌɒbləˈɡeɪʃən/

A duty or commitment to do something, often because of a law, promise, or moral principle.

Synonyms:

She has an obligation to help her mom.Paying taxes is every citizen's obligation.

Originates from Old French obligacion (13th century) and directly from Latin obligationem, meaning an engaging or pledging.

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