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Guarantee

/ˌɡærənˈtiː/

A promise or assurance that something will happen or is true, often with a commitment to make good on that promise if it turns out to be false.

Synonyms:

You can ask what guarantees from me you please."

You can't always guarantee you won't collect a crowd that way."

I have no need of any guarantees."

Originated in the late 17th century from the Old French garantie, derived from garantir, meaning to protect or ensure.

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