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.

“It is unacceptable that wildfire survivors—people who have lost everything—were met with delays, underpayments, and roadblocks when they needed help the most.”

From The Wall Street Journal • May 4, 2026

“These attacks constitute a dangerous escalation and an unacceptable transgression,” said a statement from the UAE’s foreign ministry, adding that it “reserves its full and legitimate right to respond to these attacks.”

From Los Angeles Times • May 4, 2026

"I think it's unacceptable that we have lost too many times as defending champions of the Premier League and we shouldn't accept it," said Van Dijk.

From BBC • May 4, 2026

Christians across the world expressed their solidarity with the pope, and Meloni condemned Trump's remarks as "unacceptable" -- prompting the president to turn his fire on her.

From Barron's • May 3, 2026

This angered Badenhorst and the authorities who regarded this as unacceptable insubordination.

From "Long Walk to Freedom" by Nelson Mandela

Vocabulary lists containing unacceptable

We're not asking, we're demanding: Vocabulary from "Selma," the movie

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!