Thesaurus.com
Dictionary.com
Definitions

unacceptable

ADJECTIVE
not suitable or satisfactory
Synonyms
STRONGEST
distasteful improper inadmissible objectionable offensive repugnant undesirable unsatisfactory
WEAK
below par damaged disagreeable displeasing exceptionable half-baked ill-favored insupportable lousy not up to snuff obnoxious reject unappealing uninviting unpleasant unwanted unwelcome won't do
Antonyms
STRONGEST
acceptable agreeable appropriate good nice pleasant pleasing
WEAK
OK desirable satisfactory suitable

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.

But the recent surge has prompted criticism from influential rabbis, settler leaders and even military chief Lieutenant General Eyal Zamir, who described the attacks as "morally and ethically unacceptable".

From Barron's • Apr. 2, 2026

Murray said: "I can confirm Councillor Dean has had the whip suspended because of unacceptable comments made on an anonymous account which was not disclosed during vetting."

From BBC • Mar. 27, 2026

“This is unacceptable blackmail,” said Christophe Grudler, a centrist member of the European Parliament.

From The Wall Street Journal • Mar. 27, 2026

The status quo "has become economically unworkable and politically unacceptable", Greer said in a video statement as the global trade body's ministerial conference -- its supreme decision-making body -- kicked off in Cameroon's capital Yaounde.

From Barron's • Mar. 26, 2026

Mr. Tobin says that even though I’m dealing with loss, my behavior is unacceptable.

From "Isaiah Dunn Is My Hero" by Kelly J. Baptist

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.