swear blind

idiomatic phrase

British, informal
: to state (something) very strongly and sincerely : to insist forcefully

Word History

First Known Use

1889, in the meaning defined above

Time Traveler
The first known use of swear blind was in 1889

Rhymes for swear blind

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Browse Nearby Words

swear
swear blind
swearer-in
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Cite this Entry

“Swear blind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/swear%20blind. Accessed 8 Nov. 2025.

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