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Synonyms

unspeakable

American  
[uhn-spee-kuh-buhl] / ʌnˈspi kə bəl /

adjective

  1. not speakable; that may not be spoken.

  2. exceeding the power of speech; unutterable; inexpressible; indescribable.

    Synonyms:
    unimaginable, ineffable
  3. inexpressibly bad or objectionable.


unspeakable British  
/ ʌnˈspiːkəbəl /

adjective

  1. incapable of expression in words

    unspeakable ecstasy

  2. indescribably bad or evil

  3. not to be uttered

    unspeakable thoughts

"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 unspeakable

1350–1400; Middle English unspekeabill. See un- 1, speak ( def. ), -able ( def. )

Explanation

Something that's unspeakable can't be accurately put into words, like the unspeakable sadness of losing your beloved cat. You can use this adjective for things that can't be spoken or articulated, including the unspeakable joy of reuniting with your lost cat or certain unspeakable swear words that aren't allowed at school. But it's most often used to capture a feeling of horror that remains inexpressible even when people try to talk about it. The unspeakable evil of genocide is one example; when we can't comprehend why it happens, it's impossible to describe in words.

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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.

See Examples For:

In a statement, its CEO Andrew Judd described Bush's crimes as "deeply shocking" and said families in Hull had been let down by "his unspeakable actions."

From BBC Aug. 1, 2026

Speaking about what was previously unspeakable helped him cope with his trauma.

From Los Angeles Times Jul. 26, 2026

Asked about the lawsuit, OpenAI told AFP: "What happened in Tumbler Ridge was an unspeakable tragedy."

From Barron's Mar. 10, 2026

Maybe someone down at the petrol station, to which William keeps sneaking to mollify his insatiable chocolate addiction and where local people do unspeakable things with the gas pumps.

From The Wall Street Journal Feb. 12, 2026

Every feeling, and with the sense that they’d been stripped down to their essence, revealed for the first time in all their unspeakable beauty, their unbearable fragility.

From "Strange the Dreamer" by Laini Taylor

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