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Definitions

swear

[swair] / swɛər /
VERB
declare under oath
Synonyms
STRONGEST
affirm assert depose testify vow
STRONG
attest avow covenant maintain plight promise state trust vouch warrant
WEAK
cross one's heart depend on give one's word give witness have confidence in make an affidavit pledge oneself rely on say so state under oath swear by swear to God swear up and down take an oath
Antonyms
STRONGEST
deny
STRONG
break condemn renounce
VERB
speak profanely; be vulgar
Synonyms
STRONGEST
curse cuss
STRONG
bedamn blaspheme execrate flame imprecate
WEAK
be foul-mouthed take name in vain talk dirty use bad language utter profanity

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 came here and I walked around and I was like, I swear my family has been in this house,” she said.

From MarketWatch • Mar. 31, 2026

"It's a great contrast. The white, with the black," Trump told reporters as he showed them the ongoing work after a ceremony to swear in new the Homeland Security secretary, Markwayne Mullin.

From Barron's • Mar. 24, 2026

“Brother, I swear on the Quran, I’m not your enemy,” the commander said.

From The Wall Street Journal • Mar. 18, 2026

"It could be anything from a swear word to telling somebody they're beautiful. I don't know what it's going to be."

From BBC • Feb. 27, 2026

I swear I heard Michael humming one of the blessings under his breath as he counted up paper chain links a couple of days ago.

From "Linked" by Gordon Korman

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.