temperamental
Americanadjective
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having or exhibiting a strongly marked, individual temperament.
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moody, irritable, or sensitive.
a temperamental artist.
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given to erratic behavior; unpredictable.
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of or relating to temperament; constitutional.
temperamental differences.
adjective
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easily upset or irritated; excitable; volatile
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of, relating to, or caused by temperament
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informal working erratically and inconsistently; unreliable
a temperamental sewing machine
Other Word Forms
- nontemperamental adjective
- nontemperamentally adverb
- temperamentally adverb
- untemperamental adjective
- untemperamentally adverb
Etymology
Origin of temperamental
First recorded in 1640–50; temperament + -al 1
Explanation
If your moods change quickly and dramatically, people might describe you as temperamental. If you weren't so temperamental, maybe your friends would open up to you more. Did I say something wrong? The adjective temperamental can also be used to describe objects that behave unpredictably. A temperamental air conditioner can make for a long, hot summer. Fortunately, you're not temperamental or you might have smashed it to bits by now. The second “e” in temperamental gets swallowed so that it sounds like "temp-ra-MENT-al" (four syllables).
Vocabulary lists containing temperamental
Into the Wild
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The Lightning Thief
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This Week In Culture, April 26–May 2, 2020
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
An example he cited was Puerto Rico, a U.S. territory beleaguered by a temperamental power grid and excluded from congressional and presidential elections.
From Los Angeles Times • Apr. 3, 2026
"But young stars are so extremely spotty, active, and temperamental, that the Doppler method is a non-starter."
From Science Daily • Jan. 31, 2026
At the other end of the temperamental spectrum is Paul Giamatti, whose perpetually furious Nus Braka, space pirate, has a grudge against the Federation and was instrumental in the imprisonment of Caleb’s mother.
From The Wall Street Journal • Jan. 13, 2026
She said when there are two temperamental personalities together "there is going to be an explosion".
From BBC • Jan. 10, 2026
You may indeed call it a temperamental difference, but I venture we are talking about something rather more.
From "The Remains of the Day" by Kazuo Ishiguro
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
