could have sworn
idiom
—used to say that one feels definitely sure about something though it appears not to be true
I could have sworn that I left my keys on the counter.
Dictionary Entries Near could have sworn
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“Could have sworn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/could%20have%20sworn. Accessed 31 Oct. 2024.
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