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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.

The talks are ongoing and there is no guarantee they will result in a deal for the fund, known as MFIC, and its investments, which Apollo values at roughly $3 billion, the people cautioned.

From The Wall Street Journal • May 11, 2026

Just as the fantastic results shouldn't guarantee Carrick gets the job, these cautionary underlying numbers shouldn't necessarily prevent him from getting it either.

From BBC • May 8, 2026

If those conditions are met, the coalition can deploy resources to guarantee the safety of vessels passing through the strait and "help restore the confidence needed to calm the markets".

From Barron's • May 6, 2026

A peace deal wouldn’t guarantee immediate gas-price relief, experts say.

From MarketWatch • May 6, 2026

To guarantee his safety, Guiteau wrote a message on the back of a blank telegram form.

From "Ambushed!" by Gail Jarrow

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