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Definitions

swear to

VERB
contract
Synonyms
STRONGEST
agree buy negotiate owe settle sign up undertake
STRONG
adjust arrange assent bargain bound circumscribe clinch close commit consent covenant dicker engage initial ink limit obligate pact pledge promise set stipulate
WEAK
accept offer become indebted come around enter into firm a deal give one's word go along with hammer out deal it's a deal make terms put in writing shake hands on it sign for sign papers work out details
Antonyms
STRONG
break confuse derange disagree disapprove disarrange discourage disorder disorganize dissent end free let go open refuse reject release
WEAK
amplify break off dilate enlarge expand extend give increase lengthen spread stretch
VERB
testify
Synonyms
STRONGEST
announce argue assert declare depose indicate swear
STRONG
affirm attest bespeak betoken certify corroborate demonstrate depone evince mount prove show sing state warrant witness
WEAK
bear witness cross one's heart give evidence give facts give one's word make evident point to say so stand up for swear up and down token
Antonyms
STRONGEST
conceal deny hide
STRONG
contradict discredit refute reject veto
VERB
vouch
Synonyms
STRONG
affirm assert asseverate assure avert avow back certify confirm contend corroborate cosign declare guarantee maintain okay predicate profess prove sponsor substantiate support testify uphold verify vow warrant witness
WEAK
act as a witness answer for attest to be responsible for bear testimony get behind give an affidavit put forth rubber-stamp say so sign for stand up for swear up and down
Antonyms
STRONG
break condemn contradict deny desert disapprove disavow disclaim discourage discredit disprove invalidate neglect oppose refuse refute reject repudiate veto
WEAK
renounce
VERB
vouch for
Synonyms
WEAK
assert under oath attest guarantee vouch

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.

“I am willing to swear to my experience.”

From Salon • Apr. 12, 2026

“I swear to God, I’m going to stop everything and just design homes. I’m not kidding,” she said.

From MarketWatch • Dec. 16, 2025

There’s always the desire to overexplain, and be like, “I didn’t mean it that way, and I swear to God, I’m a feminist!”

From Salon • Oct. 17, 2025

I swear to God, it was sitcom-esque timing, but it really happened.

From Los Angeles Times • Aug. 12, 2025

Which, at face value, may not sound like the most romantic thing anyone has ever said, but trust me when I swear to you that it was.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith