noun pl. guaranties -·ties

1. a pledge committing a person to the payment of another's debt or the fulfillment of another's obligation in the event of default
2. an agreement that secures the existence or maintenance of something
3. something given or held as security
4. a guarantor

Etymology: OFr garantie < garantir, to guarantee < garant, warant, a warrant, supporter < Frank *warand, prp. of *warjan, to verify (akin to OHG werēn < wār, true < IE *weros, true > L verus), infl. also by *warjan, to defend, akin to OE werian: see weir

transitive verb guarantied -·tied, guarantying -·ty·ing