The act of binding oneself by a social, legal, or moral tie to someone.

plural of obligation

Pertaining to, or in the nature of, obligation.

The quality of being obligative.

Happy and ready to do favours for others.

The imposition of an obligation.

present participle of oblige

Under an obligation to do something. / Grateful or indebted because of a favor done.

simple past tense and past participle of oblige

(transitive) To constrain someone by force or by social, moral or legal means. / (transitive, intransitive) To do (someone) a service or favour (hence, originally, creating an obligation).