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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.

Even if a company is selected for a voucher, this doesn’t guarantee their assets will secure approval.

From Barron's • Apr. 24, 2026

But having a diploma on the wall is no guarantee of your lawyer’s competence or ethics.

From MarketWatch • Apr. 24, 2026

There is no guarantee reintroduction of the Eurasian beaver will go ahead, Gloucestershire Wildlife Trust said, and any next steps will require licensing approval from Natural England.

From BBC • Apr. 21, 2026

He added that “attacking a national landmark fits the idea of a fame-seeking attack. Picking a symbolic target is a way to almost guarantee yourself more attention.”

From Los Angeles Times • Apr. 21, 2026

“Come on. You’re local and you know the sea around here. You’re the ideal person. Please say yes. I guarantee it’ll be the greatest adventure of your life!”

From "The Boy Who Met a Whale" by Nizrana Farook

Vocabulary lists containing guarantee

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Frindle

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