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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

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

From MarketWatch Apr. 23, 2026

As he explains to Felix Salmon, Elizabeth Spiers, and Emily Peck, A.I. is a hyperobject that touches everything in unknowable ways.

From Slate Mar. 14, 2026

At its best, it’s poetry trying to make sense of the unknowable.

From Los Angeles Times Mar. 13, 2026

He’d learned, the moment he glimpsed what lay beyond the Cusp, that the realm of the unknowable was so much bigger than he’d guessed.

From "Strange the Dreamer" by Laini Taylor

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

But Spencer's Unknowable, notwithstanding its negative prefix, is the Ultimate Reality, and does all that is in any way done.

From Spencer's Philosophy of Science The Herbert Spencer Lecture Delivered at the Museum 7 November, 1913 by Morgan, C. Lloyd (Conwy Lloyd)

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