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
Relevance
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of sleepiness
The sleep expert hypothesized that the benefits of a foot massage as part of a nightly routine may contribute to sleepiness more than the actual lotion.
—
Angelica Stabile, FOXNews.com, 28 Sep. 2025
Uncomfortable side effects can occur the next day, such as headaches, daytime sleepiness, dizziness, mood changes, upset stomach, intense dreams, disorientation, or confusion.
—Maggie O'Neill, Verywell Health, 26 Sep. 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
Is your sleepiness a symbol of your love?
—Mark Travers, Forbes.com, 25 Aug. 2025
Essentially, high levels of this metabolite is an indication that the body is responding to stress effectively, and people with more of it were less likely to report daytime sleepiness.
—New Atlas, 24 Aug. 2025
Very short naps have been shown to reduce sleepiness and lift mood and to boost alertness immediately after waking, with 10-minute naps often performing best among brief options.
—Allison Palmer
august 19, Sacbee.com, 19 Aug. 2025
The condition leads to loud snoring, restless sleep, daytime sleepiness and increases the risk of high blood pressure, heart disease and stroke.
—Hannah Millington, MSNBC Newsweek, 10 Aug. 2025
Angelica Stabile, FOXNews.com, 28 Sep. 2025
Uncomfortable side effects can occur the next day, such as headaches, daytime sleepiness, dizziness, mood changes, upset stomach, intense dreams, disorientation, or confusion.
—Maggie O'Neill, Verywell Health, 26 Sep. 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
Is your sleepiness a symbol of your love?
—Mark Travers, Forbes.com, 25 Aug. 2025
Essentially, high levels of this metabolite is an indication that the body is responding to stress effectively, and people with more of it were less likely to report daytime sleepiness.
—New Atlas, 24 Aug. 2025
Very short naps have been shown to reduce sleepiness and lift mood and to boost alertness immediately after waking, with 10-minute naps often performing best among brief options.
—Allison Palmer
august 19, Sacbee.com, 19 Aug. 2025
The condition leads to loud snoring, restless sleep, daytime sleepiness and increases the risk of high blood pressure, heart disease and stroke.
—Hannah Millington, MSNBC Newsweek, 10 Aug. 2025
Recent Examples of Synonyms for sleepiness
Noun
-
Acute exposure may cause drowsiness, dizziness and headaches, as well as eye, skin and respiratory tract irritation, and unconsciousness at high levels.—
Noelle Phillips,
Denver Post,
30 Sep. 2025
-
However, this depression of the CNS may result in drowsiness, sedation, and lack of mental alertness.—
Alex Yampolsky,
Verywell Health,
29 Sep. 2025
Noun
-
There was some fatigue in our performance, but the group are always so professional and so hungry to win.—
George Caulkin,
New York Times,
6 Oct. 2025
-
Prolonged exposure to a heat index above 80 degrees can lead to fatigue, as previously reported by USA TODAY.—
Brandi D. Addison,
jsonline.com,
3 Oct. 2025
Noun
-
Weighing 1,400 pounds, the trailer features a queen-size sleeping area and a galley kitchen with upper cabinets, customizable pull-out drawers, sink, cooler and refrigerator options.—
Mars King,
Twin Cities,
30 Sep. 2025
-
On the inside, the third row of seating is gone in favor of more cargo space, and an area to lie flat with sleeping bags or other nighttime aids.—
Erik Shilling,
Robb Report,
30 Sep. 2025
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
-
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 9 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share