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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 cases rely on the Constitution’s guarantee of due process before being deprived of life, liberty or property.

From Los Angeles Times • Apr. 19, 2026

Jumping ship to a mutual insurance company doesn’t necessarily guarantee a better deal, but it’s a calculation many are weighing as high insurance costs strain budgets that are already feeling the inflation squeeze.

From MarketWatch • Apr. 16, 2026

“Pivot,” hosted by Kara Swisher and Scott Galloway, has no upfront guarantee but offers the hosts a generous cut of their show’s ad revenue.

From The Wall Street Journal • Apr. 15, 2026

In 1971, the Supreme Court began to patch this hole in a case called Bivens, approving monetary damages against federal agents who violated the Fourth Amendment’s guarantee against unreasonable search and seizure.

From Slate • Apr. 15, 2026

“Fine. That is, I’m sure it will be fine. Unfortunately I’m one of those no-rankers. So, you see, I can’t actually guarantee it will be fine....”

From "Artemis Fowl" by Eoin Colfer

Vocabulary lists containing guarantee

Declaration of the Rights of Woman (1791)

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Frindle

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"The Constitution"

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