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duty bound

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duty bound

(to do something) forced by a sense of duty and honor to do something. Good evening, madam. I'm duty bound to inform you that we have arrested your husband. No one made me say that. I was duty bound.

See also: bound, duty

duty bound

Obliged, as in You're duty bound to help your little brother. [c. 1900]

See also: bound, duty

duty bound

Obliged: You are duty bound to help your little sister and brother.

See also: bound, duty