Middle English aknowen, going back to Old English oncnāwan, acnāwan "to know, recognize, admit, confess," from a-, on-, prefixal use of on on entry 1 + cnāwan "to know entry 1"
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“Acknow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acknow. Accessed 2 Dec. 2023.
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