EN

Synonyms for unknowable

  • adjective

Most common

mysterious incomprehensible unfathomable inscrutable enigmatic impenetrable unintelligible fathomless

All synonyms

Adjective

incomprehensible, inscrutable, unfathomable, mysterious, unintelligible, impenetrable, enigmatic, fathomless, undecipherable, mystic, incognizable, incognisable UK, ungraspable, undiscoverable, inexplicable, obscure, incognoscible dated rare

Antonyms

knowable, clear, straight-forward

All antonyms of unknowable →

Definitions

  1. adj. 1

    Not knowable; not able to be known.

Example sentences

  • mysterious A mysterious spaceship was flying away from Earth.
  • incomprehensible This language is incomprehensible to me when spoken.
  • unfathomable It is just unfathomable to even think about.
  • inscrutable She looked at him with an inscrutable expression.
  • enigmatic She's a strange, enigmatic and inspiring poet.
  • impenetrable The wall appeared to be smooth and impenetrable.

Popularity over time

Word1850 → 2019Trend
unknowablerising
mysteriousrising
incomprehensiblerising
unfathomablerising
inscrutablerising
enigmaticrising

Use in printed books, per decade from 1850 to 2019.

By length

6 letters
mystic2
7 letters
obscure2
9 letters
enigmatic4
10 letters
mysterious4, fathomless
11 letters
inscrutable4, ungraspable
12 letters
impenetrable5, inexplicable5, unfathomable5, incognizable, incognisable
13 letters
incognoscible
14 letters
unintelligible6, undecipherable, undiscoverable

The small number after each word is its number of syllables (mystic2 = 2 syllables).