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From the Editors at Merriam-Webster
8 Obscure Words for Sleepy Times
8 Obscure Words for Sleepy Times
If you have the energy
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Last Updated
24 Feb 2020
Cite this Entry
“Sleep in.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sleep%20in. Accessed 1 Apr. 2020.
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Time Traveler for sleep in
The first known use of sleep in was in 1827
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