not know one's own strength
idiom
: to not realize how strong one really is
He didn't mean to knock you down; he just doesn't know his own strength.
Cite this Entry
“Not know one's own strength.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/not%20know%20one%27s%20own%20strength. Accessed 31 Oct. 2025.
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Merriam-Webster unabridged
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