troth

1 a person's solemn declaration that he or she will do or not do something by my troth, I will not trespass on your precious property Synonyms oath, pledge, promise, vow, wordRelated Words appointment, arrangement, commitment, engagement, obligation; agreement, compact, contract, covenant; assurance, guarantee, guaranty, undertaking; bail, bond, deposit, gage, pawn, security, token, warranty

2 the act or state of being engaged to be married solemnly announced their troth before the church's congregation Synonyms betrothal, espousal, engagementAntonyms disengagement

3 adherence to something to which one is bound by a pledge or duty the knight pledged his eternal troth to the defense of the kingdom Synonyms adhesion, allegiance, attachment, commitment, constancy, dedication, devotedness, devotion, faith, faithfulness, fastness, fealty, loyalty, piety, steadfastness, fidelityRelated Words affection, fondness; determination, firmness, resolution; dependability, reliability, trustability, trustiness, trustworthinessNear Antonyms alienation, disaffection, estrangement, separationAntonyms disloyalty, faithlessness, falseness, falsity, inconstancy, infidelity, perfidiousness, perfidy, treachery, unfaithfulness

to obligate by prior agreement I troth myself eternally to your service Synonyms commit, engage, mortgage, pledgeRelated Words affiance, betroth, plight, promise, swear, vow; contract, enlist, enroll (also enrol), sign on, sign up; overcommitNear Antonyms renege