be honor-bound to do (something)

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be honor-bound to do (something)

To be or feel obliged to do something because it is morally correct or required by one's sense of duty or integrity, even if one does not desire to do so. Primarily heard in US. It pains me to turn you in to the police, my friend, but I am honor-bound to inform them of your actions.
References in periodicals archive ?
Hector introduces her to horses; she loves Andromache and Cassandra; and although her loyalties first go to Menelaus and his little son, she also feels honor-bound to do nothing to betray Troy.