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  • unknowable
    unknowable
    adjective
    not knowable; incapable of being known or understood.
  • Unknowable
    Unknowable
    noun
    philosophy the ultimate reality that underlies all phenomena but cannot be known
Synonyms

unknowable

American  
[uhn-noh-uh-buhl] / ʌnˈnoʊ ə bəl /

adjective

  1. not knowable; incapable of being known or understood.


noun

  1. something that is unknowable.

  2. the Unknowable, the postulated reality lying behind all phenomena but not cognizable by any of the processes by which the mind cognizes phenomenal objects.

unknowable 1 British  
/ ʌnˈnəʊəbəl /

adjective

  1. incapable of being known or understood

    1. beyond human understanding

    2. ( as noun )

      the unknowable

"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

Unknowable 2 British  
/ ʌnˈnəʊəbəl /

noun

  1. philosophy the ultimate reality that underlies all phenomena but cannot be known

"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 unknowable

Middle English word dating back to 1325–75; see origin at un- 1, knowable

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:

One of his colleagues' frustrations with him has always been that he seems unknowable.

From BBC Jun. 20, 2026

He isn’t unknowable at all—and it’s crucial to understand what led up to his greater project on the Supreme Court.

From Slate May 13, 2026

Your greatest retirement risk may be something that’s unknowable: how long you will live.

From MarketWatch Apr. 23, 2026

And that in turn is conditional on a host of at this stage unknowable developments: the deployment of ground forces, the contribution of neighbors and others to the shipping challenge.

From The Wall Street Journal Mar. 30, 2026

When I first arrived here, I felt like the compound was huge and unknowable.

From "Allegiant" by Veronica Roth

Unknowable and terrifying, the workings of the mind can feel like a supernatural force.

From Los Angeles Times Jan. 9, 2022

Unknowable today is whether E.U. policymakers will stick with their program or undercut the policy when prices start to rise, as they have in the past.

From Washington Post Jul. 18, 2021

Unknowable — so no need to judge too harshly.

From Washington Post Jan. 13, 2017

Hardoon's topic--tonight and every Thursday, to packed classes--is how to align oneself with "the Light," the never-ending mystical emanation of the Unknowable God, Ein Sof.

From Time Magazine Archive

The Unknowable assumed as existent entity is the Unknowable known,—a self-contradiction.

From A Review of the Systems of Ethics Founded on the Theory of Evolution by Williams, C. M.

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