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Definitions

guarantee

[gar-uhn-tee] / ˌgær ənˈti /
NOUN
pledge, promise
Synonyms
STRONGEST
agreement assurance certificate collateral contract deposit insurance security warranty
STRONG
attestation bail bargain bond certainty certification charter covenant earnest gage guaranty lock oath pawn pipe recognizance surety testament token undertaking vow warrant word
WEAK
sure thing word of honor
Antonyms
STRONGEST
disagreement uncertainty
STRONG
breach break
VERB
pledge, promise
Synonyms
STRONGEST
assure ensure insure maintain protect prove secure support
STRONG
affirm angel attest aver back bankroll certify confirm cosign endorse evidence evince grubstake guaranty juice mortgage reassure stake swear testify wager warrant witness
WEAK
answer for be surety for bind oneself get behind give bond make bail make certain make sure pick up the check pick up the tab sign for stand behind stand up for vouch for
Antonyms
STRONGEST
harm hurt injure let go neglect
STRONG
contradict deny discourage disprove invalidate oppose refute reject repudiate veto
WEAK
break

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And that’s why there’s no clear timeline or guarantee that this cease-fire will lead to the war’s end.

From MarketWatch • Apr. 9, 2026

But those price targets rely on traffic through the Strait of Hormuz to start picking up—and there’s no guarantee of that right now.

From Barron's • Apr. 9, 2026

If Palace and Forest were both to win European trophies, that would guarantee 10 English teams in Europe.

From BBC • Apr. 8, 2026

Nead: There are just so many shows now that unless the show’s really taking off and that viewership is there, it’s not a guarantee that you’re just going to have a major rise in followers.

From The Wall Street Journal • Apr. 3, 2026

“I have no guarantee whatsoever that you won’t just arrest me as soon as I walk through those doors behind me.”

From "Anger Is a Gift" by Mark Oshiro