N. promise, undertaking, word, troth, plight, pledge, parole, word of honor, vow, oath, profession, assurance, warranty, guarantee, insurance, obligation, contract, stipulation, engagement, preengagement, affiance, betroth, betrothal, betrothment

V. promise, give a promise, undertake, engage, make an engagement, form an engagement, enter into an engagement, enter on an engagement, bind oneself, tie oneself, pledge oneself, commit oneself, take upon oneself, vow, swear, give one's word, pass one's word, pledge one's word, plight one's word, give one's honor, pass one's honor, pledge one's honor, plight one's honor, give credit, pass credit, pledge credit, plight credit, give troth, pass troth, pledge troth, plight troth, betroth, plight faith, assure, warrant, guarantee, covenant, attest, hold out an expectation, contract an obligation, become bound to, become sponsor for, answer for, be answerable for, secure, give security, underwrite, adjure, administer an oath, put to one's oath, swear a witness

Adj. promising, promissory, votive, under hand and seal, upon oath, promised, affianced, pledged, bound, committed, compromised, in for it

Adv. as one's head shall answer for

Phr. in for a penny in for a pound, ex voto, gage d'amour