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Synonyms

undesirable

American  
[uhn-di-zahyuhr-uh-buhl] / ˌʌn dɪˈzaɪər ə bəl /

adjective

  1. not desirable or attractive; objectionable.

    undesirable qualities.


noun

  1. a person or thing considered undesirable.

    a collection of malcontents and undesirables.

undesirable British  
/ ˌʌndɪˈzaɪərəbəl /

adjective

  1. not desirable or pleasant; objectionable

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a person or thing that is considered undesirable

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of undesirable

First recorded in 1660–70; un- 1 + desirable

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.

"China believes that achieving a comprehensive ceasefire is an urgent priority, while reopening hostilities would be even more undesirable," said Wang Yi, according to a readout by state media.

From BBC • May 6, 2026

They contended that through mental exercises, people could alter the shapes of their own brains, cultivating desirable qualities and suppressing undesirable ones.

From The Wall Street Journal • Apr. 29, 2026

If those numbers are borne out in the real world, most people on GLP-1s may have some kind of undesirable GI effect from them.

From Slate • Mar. 22, 2026

"This is a new way to make a fundamental carbon-carbon bond and that's why the potential impact is so great. It also means chemists can avoid an undesirable and inefficient drug modification process."

From Science Daily • Mar. 14, 2026

If the spacecraft’s three landing pods had sunk deeply into a loosely packed soil, various undesirable consequences would have followed, including immobilization of the sample arm.

From "Cosmos" by Carl Sagan

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