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
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of sleepiness
What’s more, by helping to maintain neutral cervical positioning, posture-supporting pillows may help improve sleep comfort and reduce waking symptoms such as tension headaches and daytime sleepiness, as Tara Phaff, DPT explains.
—
Kristine Thomason, Vogue, 25 Mar. 2026
Symptoms include decreased urination, dry mouth and throat, feeling dizzy when standing up, crying with few or no tears, and unusual sleepiness or fussiness.
—Michele Laufik, Martha Stewart, 10 Mar. 2026
Boost Energy and Alertness Taking a walk in the morning has been associated with lower daytime sleepiness and improved alertness during the day.
—Heather Jones, Verywell Health, 20 Feb. 2026
At higher doses, kratom reduces anxiety and causes sleepiness, the way strong pain drugs like opioids (heroin or fentanyl) do.
—Gary Kirkilas Ii, Boston Herald, 1 Feb. 2026
The participants were scored on subjective sleepiness (Karolinska Sleepiness Scale), sustained attention (Psychomotor Vigilance Task), working memory (three-back task) and visual search performance.
—New Atlas, 17 Jan. 2026
Your balloon fills up with sleepiness throughout the day.
—Andee Tagle, NPR, 15 Jan. 2026
In a clinical study of tradipitant, side effects were infrequent and mild, with a small percent of users reporting sleepiness and fatigue.
—Emily Kay Votruba, EverydayHealth.com, 8 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
Kristine Thomason, Vogue, 25 Mar. 2026
Symptoms include decreased urination, dry mouth and throat, feeling dizzy when standing up, crying with few or no tears, and unusual sleepiness or fussiness.
—Michele Laufik, Martha Stewart, 10 Mar. 2026
Boost Energy and Alertness Taking a walk in the morning has been associated with lower daytime sleepiness and improved alertness during the day.
—Heather Jones, Verywell Health, 20 Feb. 2026
At higher doses, kratom reduces anxiety and causes sleepiness, the way strong pain drugs like opioids (heroin or fentanyl) do.
—Gary Kirkilas Ii, Boston Herald, 1 Feb. 2026
The participants were scored on subjective sleepiness (Karolinska Sleepiness Scale), sustained attention (Psychomotor Vigilance Task), working memory (three-back task) and visual search performance.
—New Atlas, 17 Jan. 2026
Your balloon fills up with sleepiness throughout the day.
—Andee Tagle, NPR, 15 Jan. 2026
In a clinical study of tradipitant, side effects were infrequent and mild, with a small percent of users reporting sleepiness and fatigue.
—Emily Kay Votruba, EverydayHealth.com, 8 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
Recent Examples of Synonyms for sleepiness
Noun
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The drugs may also be used to treat other neurological conditions that are accompanied by drowsiness, such as Alzheimer’s disease and depression, and possibly even more broadly.—
Angelica Peebles,
CNBC,
31 Mar. 2026
-
Avoid driving on medications that cause drowsiness.—
Camila Pedrosa,
Sacbee.com,
30 Mar. 2026
Noun
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The Form Insoles combine mechanical arch support with a neuro-stimulating texture, which is proven to reduce foot fatigue and arch pain by increasing overall foot awareness and foot posture.—
Tory Johnson,
ABC News,
28 Mar. 2026
-
Of course, the real flex is chartering your own flight—avoiding check-in-desk fatigue, security lines, and concern about overweight luggage altogether.—
Justin Fenner,
Robb Report,
28 Mar. 2026
Noun
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During the shootout, the 71-year-old sleeping man who was sleeping nearby in his home was grazed in the arm by one of the bullets.—
Matt Schooley,
CBS News,
29 Mar. 2026
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One stairway leads to a spacious sleeping loft, while another set of stairs leads to three additional bedrooms, including dual primary suites with ocean views.—
Tracy Wright,
FOXNews.com,
28 Mar. 2026
Noun
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From there, the story builds on the uncertainty, rocking the somnolence of a small town in the province of Badajoz, and forcing a community to choose between disbelief and the need to prove what can’t be seen.—
Emiliano De Pablos,
Variety,
9 Feb. 2026
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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
Cite this Entry
“Sleepiness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sleepiness. Accessed 3 Apr. 2026.
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