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
Common signs include loud snoring, waking up gasping, morning headaches and daytime sleepiness that doesn’t improve with more hours in bed.
—
Allison Palmer, Sacbee.com, 18 May 2026
Shift Work Sleep Disorder, or SWSD, is the clinical name for the persistent insomnia or excessive sleepiness that lasts more than three months and is tied directly to a person’s work schedule.
—Allison Palmer, Fort Worth Star-Telegram, 16 May 2026
However, sleepiness returns when the caffeine wears off.
—Ashley Olivine, Verywell Health, 11 May 2026
Researchers also observed improvements in sleep maintenance and reductions in daytime fatigue, anxiety, depression symptoms and daytime sleepiness.
—Samantha Agate, Kansas City Star, 7 May 2026
Researchers measured insomnia severity using the Insomnia Severity Index, along with sleep maintenance, daytime sleepiness, fatigue, anxiety and depression symptoms.
—Samantha Agate, Charlotte Observer, 7 May 2026
Mention any daytime symptoms, such as excessive sleepiness or headaches, and any nighttime symptoms, such as frequent urination, waking up short of breath, snoring or insomnia.
—Erika Yamazaki, The Conversation, 6 May 2026
Some over‑the‑counter products that can pose risks include certain antihistamines, commonly found in allergy and cold remedies, nighttime sleep aids, motion sickness medications, and cough syrups, which can induce sleepiness or slow down cognitive function.
—Amanda Greenwood, MSNBC Newsweek, 1 Apr. 2026
It’s shown promising results in Phase 2a clinical studies across type 1 and type 2 narcolepsy and idiopathic hypersomnia, which is another form of excessive daytime sleepiness.
—Jeff Marks, CNBC, 31 Mar. 2026
Allison Palmer, Sacbee.com, 18 May 2026
Shift Work Sleep Disorder, or SWSD, is the clinical name for the persistent insomnia or excessive sleepiness that lasts more than three months and is tied directly to a person’s work schedule.
—Allison Palmer, Fort Worth Star-Telegram, 16 May 2026
However, sleepiness returns when the caffeine wears off.
—Ashley Olivine, Verywell Health, 11 May 2026
Researchers also observed improvements in sleep maintenance and reductions in daytime fatigue, anxiety, depression symptoms and daytime sleepiness.
—Samantha Agate, Kansas City Star, 7 May 2026
Researchers measured insomnia severity using the Insomnia Severity Index, along with sleep maintenance, daytime sleepiness, fatigue, anxiety and depression symptoms.
—Samantha Agate, Charlotte Observer, 7 May 2026
Mention any daytime symptoms, such as excessive sleepiness or headaches, and any nighttime symptoms, such as frequent urination, waking up short of breath, snoring or insomnia.
—Erika Yamazaki, The Conversation, 6 May 2026
Some over‑the‑counter products that can pose risks include certain antihistamines, commonly found in allergy and cold remedies, nighttime sleep aids, motion sickness medications, and cough syrups, which can induce sleepiness or slow down cognitive function.
—Amanda Greenwood, MSNBC Newsweek, 1 Apr. 2026
It’s shown promising results in Phase 2a clinical studies across type 1 and type 2 narcolepsy and idiopathic hypersomnia, which is another form of excessive daytime sleepiness.
—Jeff Marks, CNBC, 31 Mar. 2026
Recent Examples of Synonyms for sleepiness
Noun
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At higher doses, melatonin can also cause morning grogginess and daytime drowsiness, Jafari said.—
Mira Miller,
Verywell Health,
2 June 2026
-
The practical effect is a calmer, less reactive brain at bedtime, without any drowsiness.—
Allison Palmer,
Fort Worth Star-Telegram,
23 Apr. 2026
Noun
-
Faith Hinitt bought her first home in June 2023 in England, yet began experiencing symptoms like an itchy rash on her chest, night sweats, fatigue and more, according to Kennedy News & Media.—
Lexi Lane,
PEOPLE,
6 June 2026
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Designed to reduce fatigue on long-haul flights Bombardier is also highlighting the aircraft’s cabin environment as a key part of the Global 8000’s appeal.—
Atharva Gosavi,
Interesting Engineering,
6 June 2026
Noun
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For the last two mornings, both women had peeled themselves out of their sleeping bags before sunrise.—
Elise Schmelzer,
Denver Post,
7 June 2026
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Supertramp even steps up available sleeping capacity to six people with its integrated pop-up rooftop tent option.—
New Atlas,
New Atlas,
4 June 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 8 Jun. 2026.
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