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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.

If DeployCo fails to perform well, OpenAI would be at risk of losing up to $700 million a year on its guarantee once the joint venture is fully funded.

From The Wall Street Journal • May 1, 2026

Turk urged Cambodia to ensure that legitimate criticism and expression are protected rather than criminalised, to safeguard civic space, to guarantee the independence of the judiciary and uphold fair trial guarantees.

From Barron's • May 1, 2026

“There’s no guarantee or mechanism to assure that illegal operators will pay the taxes or fulfill their obligations,” Rivera said.

From Los Angeles Times • May 1, 2026

Just because there is a “classic” mBB sell signal does not guarantee that there will be an MVB sell signal to follow.

From MarketWatch • Apr. 30, 2026

See: She thinks it’s a situation she can control, which is almost a guarantee that she’s wrong.

From "A Heart in a Body in the World" by Deb Caletti

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