Etymology From Old French guarantie (perhaps via a later Spanish garante), from the verb guarantir (“to protect, assure, vouch for”), ultimately from Old Frankish *warjand, *warand (“a warrant”), or from guaranty. Doublet of guaranty and warranty.
1
Anything that assures a certain outcome.
Can you give me a guarantee that he will be fit for the match?
After his actions were challenged by foreign governments and Parliament initially tried to put a stop to his action, Denman returned home and argued his case with enough force that, by 1848, the Royal Navy was handed active permission and encouragement to raze every last slave factory they could find to the ground, and full authority to stop any ship, of any flag, that was thought to be a slaver, with a guarantee with^([sic]) no censure from the government.2018 December 1, Drachinifel, 9:45 from the start, in Anti-Slavery Patrols - The West Africa Squadron, archived from the original on 29 Nov 2024:
2
A legal assurance of something, e.g. a security for the fulfillment of an obligation.
3
Specifically A written declaration that a certain product will be fit for a purpose and work correctly; a warranty.
The cooker comes with a five-year guarantee.
4
The person to whom a guarantee is made.
5
Colloquial A person who gives such a guarantee; a guarantor.
But God who is the great Guarantee for the Peace , Order , and good behaviour of Mankind1692–1717, Robert South, Twelve Sermons Preached upon Several Occasions, volume (please specify |volume=I to VI), London:
Etymology From Old French guarantie (perhaps via a later Spanish garante), from the verb guarantir (“to protect, assure, vouch for”), ultimately from Old Frankish *warjand, *warand (“a warrant”), or from guaranty. Doublet of guaranty and warranty.
1
To give an assurance that something will be done right.
2
To assume or take responsibility for a debt or other obligation.