as in drowsiness
the quality or state of desiring or needing sleep
the truck driver keeps a thermos of coffee with him to stave off sleepiness
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of sleepiness
This can lead to feeling ill, with symptoms such as sleepiness, physical fatigue, headache, and more.
—
Ashley Olivine, Verywell Health, 5 Jan. 2026
Ounce for ounce, turkey contains less tryptophan—an amino acid popularly blamed for post-Thanksgiving sleepiness—than cheddar cheese or an octopus does.
—The Atlantic Science Desk, The Atlantic, 27 Dec. 2025
Studies showed that some women experienced side effects including dizziness, sleepiness and nausea, and less than 2% had to discontinue Addyi because of them.
—Alice Park, Time, 16 Dec. 2025
Her sleepiness follows her there.
—Literary Hub, 8 Dec. 2025
For infants, additional red flags include difficulty feeding, fewer wet diapers, fast or labored breathing or unusual sleepiness.
—Katia Hetter, CNN Money, 4 Dec. 2025
The post-feast nap is often blamed on turkey, which contains tryptophan — an amino acid linked to sleepiness.
—Khloe Quill, FOXNews.com, 27 Nov. 2025
Later breakfast time was consistently connected with having physical and mental health conditions such as depression, excessive sleepiness, and dental problems.
—Tom Gavin, EverydayHealth.com, 5 Sep. 2025
Their sleepiness, in reality, could just be a silent love — signed dearly by their nervous system.
—Mark Travers, Forbes.com, 25 Aug. 2025
Ashley Olivine, Verywell Health, 5 Jan. 2026
Ounce for ounce, turkey contains less tryptophan—an amino acid popularly blamed for post-Thanksgiving sleepiness—than cheddar cheese or an octopus does.
—The Atlantic Science Desk, The Atlantic, 27 Dec. 2025
Studies showed that some women experienced side effects including dizziness, sleepiness and nausea, and less than 2% had to discontinue Addyi because of them.
—Alice Park, Time, 16 Dec. 2025
Her sleepiness follows her there.
—Literary Hub, 8 Dec. 2025
For infants, additional red flags include difficulty feeding, fewer wet diapers, fast or labored breathing or unusual sleepiness.
—Katia Hetter, CNN Money, 4 Dec. 2025
The post-feast nap is often blamed on turkey, which contains tryptophan — an amino acid linked to sleepiness.
—Khloe Quill, FOXNews.com, 27 Nov. 2025
Later breakfast time was consistently connected with having physical and mental health conditions such as depression, excessive sleepiness, and dental problems.
—Tom Gavin, EverydayHealth.com, 5 Sep. 2025
Their sleepiness, in reality, could just be a silent love — signed dearly by their nervous system.
—Mark Travers, Forbes.com, 25 Aug. 2025
Recent Examples of Synonyms for sleepiness
Noun
-
These over-the-counter medicines are safe to use daily, but can cause side effects such as drowsiness and dryness in the nose and mouth.—
Nicole Villalpando,
Austin American Statesman,
5 Jan. 2026
-
In the cold weather, shivering that suddenly stops, drowsiness, stumbling, or pale gums could be signs of hypothermia, which would need to be addressed immediately.—
Letters to the Editor,
Hartford Courant,
5 Jan. 2026
Noun
-
But Vanderbilt, as attention, pressure and fatigue rise on a pursuit no one outside its camp expected, is essentially two teams with two games left in the 2025 regular season.—
Joe Rexrode,
New York Times,
9 Nov. 2025
-
Despite widespread fatigue over tipping prompts, Americans still tend to be generous when dining out at restaurants.—
Peter Burke,
FOXNews.com,
9 Nov. 2025
Noun
-
They’re combined with a non-toxic, hypoallergenic down alternative filling, creating a plush and luxurious sleeping experience that’s designed for back, side, and stomach sleepers.—
Megan Schaltegger,
PEOPLE,
7 Jan. 2026
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People with strong circadian rhythms are usually able to stick to regular times for sleeping and activity, even with schedule or season changes, experts say.—
Khloe Quill,
FOXNews.com,
6 Jan. 2026
Noun
-
The people went to the emergency department with tachycardia, confusion, anxiety or somnolence, and nausea after eating gummy candies labeled as containing Amanita muscaria mushrooms.—
Beth Mole,
Ars Technica,
19 July 2024
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Organized labor shows corporate managements who’s the boss: This year continued the strengthening of union power after decades of somnolence.—
Michael Hiltzik,
Los Angeles Times,
21 Dec. 2023
Cite this Entry
“Sleepiness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sleepiness. Accessed 11 Jan. 2026.
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