S: (v) guarantee, warrant (stand behind and guarantee the quality, accuracy, or condition of) "The dealer warrants all the cars he sells"; "I warrant this information"
S: (v) reinsure (insure again by assuming all or a part of the liability of an insurance company already covering a risk)
S: (v) indemnify (secure against future loss, damage, or liability; give security for) "This plan indemnifies workers against wages lost through illness"
S: (v) certify, endorse, indorse (guarantee as meeting a certain standard) "certified grade AAA meat"