S: (n) guarantee (guarantee%1:10:01::) (an unconditional commitment that something will happen or that something is true) "there is no guarantee that they are not lying"
S: (n) guarantee (guarantee%1:21:03::), guaranty (guaranty%1:21:00::) (a collateral agreement to answer for the debt of another in case that person defaults)
Verb
S: (v) guarantee (guarantee%2:32:00::), vouch (vouch%2:32:12::) (give surety or assume responsibility) "I vouch for the quality of my products"
S: (v) guarantee (guarantee%2:32:02::), warrant (warrant%2:32:01::) (stand behind and guarantee the quality, accuracy, or condition of) "The dealer warrants all the cars he sells"; "I warrant this information"