(transitive, US) to not fulfill; stop short of fulfillment or completion
He declares that when he was bachelor he had love relations with a woman whose name he cannot state and from which relations a child was borne by the name of Domingo, of forty three years of age, and who was baptized in the parish of Mandurriao, Iloilo, by the name of Domingo of unknown parents, and he being not willing to unfulfill the duties of his conscience and those which the nature imposes upon him, […]
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