unfriendly
Americanadjective
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not amicable; not friendly or kindly in disposition; unsympathetic; aloof.
an unfriendly coldness of manner.
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hostile; antagonistic.
an unfriendly act of aggression.
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unfavorable; inhospitable or inimical, as an environment.
an unfriendly climate for new ideas.
adverb
adjective
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not friendly; hostile
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unfavourable or disagreeable
adverb
Other Word Forms
Etymology
Origin of unfriendly
before 900; Middle English (adj.); Old English unfreondlīche (adv.). See un- 1, friendly
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.
By February of last year, I was taxing leaders of the Air Force’s Barksdale B-52 base about the real problem, which government leaks even now admitted—conventional drones likely operated by unfriendly powers within U.S. airspace.
From The Wall Street Journal • Jun. 26, 2026
One thing I can’t play is family unfriendly tunes.
From Salon • Jun. 6, 2026
The ruling also suspends a Pentagon designation of Anthropic, creator of the Claude AI model, as a national security supply chain risk -- a label typically reserved for organizations from unfriendly foreign countries.
From Barron's • Mar. 26, 2026
Historically, there’s always been this friendly or maybe unfriendly competition between people.
From Los Angeles Times • Dec. 18, 2025
People wasn’t unfriendly, but I got the feeling they wasn’t used to strangers.
From "Life Is So Good" by George Dawson
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.
