adjective
-
liable to catch fire; flammable
-
readily aroused to anger or passion
noun
Commonly Confused
Inflammable and flammable both mean “combustible.” Inflammable is the older by about 200 years. Flammable now has certain technical uses, particularly as a warning on vehicles carrying combustible materials, because of a belief that some might interpret the intensive prefix in- of inflammable as a negative prefix and thus think the word means “noncombustible.” Inflammable is the word more usually used in nontechnical and figurative contexts: The speaker ignited the inflammable emotions of the crowd.
Other Word Forms
Etymology
Origin of inflammable
1595–1605; < Medieval Latin inflammābilis, equivalent to Latin inflammā ( re ) to inflame + -bilis -ble
Explanation
Something that is inflammable can be set on fire easily. You dared not light a match after you accidentally spilled gasoline on yourself because you knew you were inflammable. Inflammable can be a tricky word, since the in- prefix often means "not." But in this case, the in- isn't really a prefix, because the word is built from the verb inflame which means "to set on fire." Some inflammable things might literally go up in flames, but we also use it metaphorically. Someone with a quick temper could be described as "inflammable," and if you fall in love easily, then you have an inflammable heart.
Vocabulary lists containing inflammable
Commonly Confused Words, List 5
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fla, flam (flame)
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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.
In addition, they contain no easily inflammable liquids.
From Science Daily ● Oct. 23, 2023
In the case of inflammable and toxic chemicals, the river is often the only viable option for transport.
From Reuters ● Jul. 26, 2023
The president's remarks are meant to calm a potentially inflammable atmosphere in Nanterre, near the La Défense business district, and other Paris suburbs, where the killing of Nahel has triggered strong emotions.
From BBC ● Jun. 28, 2023
The mighty sequoia, protected by thick bark and with its foliage typically high above the flames, was once considered nearly inflammable.
From Seattle Times ● Jul. 22, 2022
The aeronaut checked his instruments from time to time, chewed on the cigar he would never light with the inflammable hydrogen so close, and huddled deeper into his own furs.
From "The Golden Compass" by Philip Pullman
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.
