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Showing results for unknowable. Search instead for unknowabilitie.
Definitions

unknowable

[uhn-noh-uh-buhl] / ʌnˈnoʊ ə bəl /
ADJECTIVE
arcane
Synonyms
STRONGEST
esoteric impenetrable
WEAK
cabalistic mysterious mystic occult recondite unaccountable
Antonyms
WEAK
common commonplace known normal outward
ADJECTIVE
impenetrable
Synonyms
STRONGEST
arcane baffling inexplicable inscrutable mysterious unaccountable unfathomable unintelligible
WEAK
Delphic cabalistic dark enigmatic enigmatical hidden incognizable indiscernible mystic obscure sibylline ungraspable
Antonyms
STRONGEST
clear comprehensible explainable explicable intelligible known obvious plain
WEAK
penetrable permeable porous soft thin understandable
ADJECTIVE
incomprehensible
Synonyms
STRONGEST
baffling impenetrable inconceivable mystifying opaque puzzling unfathomable unimaginable unintelligible
WEAK
Delphic beats me beyond comprehension beyond one's grasp clear as mud cryptic enigmatic fathomless incognizable inscrutable mysterious obscure over one's head perplexing sibylline unclear ungraspable
Antonyms
STRONGEST
believable clear comprehensible fathomable imaginable intelligible understandable
ADJECTIVE
inconceivable
Synonyms
STRONGEST
extraordinary implausible impossible improbable incredible mind-boggling strange unbelievable unheard-of unimaginable unthinkable
WEAK
fantastic incogitable incomprehensible insupposable phony rare reachy staggering thin unconvincing unlikely unsubstantial weak won't fly won't wash
Antonyms
STRONGEST
believable common credible familiar likely normal plausible possible reasonable tenable usual
WEAK
conceivable fathomable imaginable
ADJECTIVE
inscrutable
Synonyms
STRONGEST
enigmatic impenetrable incomprehensible unfathomable unintelligible
WEAK
ambiguous arcane cabalistic deadpan difficult inexplicable mysterial mystic poker-faced secret sphinxlike unaccountable undiscoverable unexplainable unreadable
Antonyms
STRONGEST
clear comprehensible fathomable intelligible understandable
WEAK
evident obvious plain
ADJECTIVE
mysterious
Synonyms
STRONGEST
baffling cryptic curious dark enigmatic inexplicable inscrutable magical mystical mystifying obscure perplexing puzzling secretive strange unknown weird
WEAK
abstruse alchemistic arcane astrological cabalistic covert difficult eldritch enigmatical equivocal esoteric furtive hidden impenetrable incomprehensible insoluble necromantic occult oracular recondite sphinxlike spiritual subjective symbolic transcendental uncanny unfathomable unnatural veiled
Antonyms
STRONGEST
apparent bright clear comprehendible comprehensible evident familiar intelligible known normal obvious plain regular usual visible
WEAK
public straightforward tangible unmysterious
ADJECTIVE
mystic
Synonyms
STRONGEST
mystical otherworldly supernatural
STRONG
imaginary magic occult spiritual visionary
WEAK
abstruse anagogic arcane cabalistic cryptic enigmatical esoteric hidden impenetrable inscrutable magical metaphysical mysterial mysterious necromantic nonrational numinous paranormal preternatural quixotic sorcerous telestic thaumaturgic transcendental unaccountable witchlike wizardly
Antonyms
STRONG
physical real
ADJECTIVE
mystic/mystical
Synonyms
WEAK
abstruse anagogic arcane cabalistic cryptic enigmatical hidden imaginary impenetrable inscrutable magic magical metaphysical mysterial mysterious necromantic nonrational numinous occult otherworldly paranormal preternatural quixotic sorcerous spiritual supernatural telestic thaumaturgic transcendental unaccountable visionary wizardly
Antonyms
WEAK
knowable natural palpable undisguised
ADJECTIVE
mystifying
Synonyms
STRONGEST
baffling cryptic equivocal esoteric incomprehensible inexplicable inscrutable magical perplexing puzzling secretive subjective unnatural
STRONG
hidden obscure occult veiled
WEAK
abstruse alchemistic arcane astrological cabalistic covert curious dark difficult enigmatic enigmatical furtive impenetrable insoluble mystic mystical necromantic oracular recondite sphinxlike spiritual strange symbolic transcendental uncanny unfathomable unknown weird
Antonyms
STRONGEST
clear comprehendible comprehensible intelligible obvious plain understandable
STRONG
known
ADJECTIVE
supernatural
Synonyms
STRONGEST
celestial fairy ghostly heavenly metaphysical miraculous mythical psychic superhuman uncanny
STRONG
dark eldritch mystic occult phantom secret superior unknown
WEAK
abnormal concealed fabulous hidden impenetrable invisible legendary mythological numinous obscure paranormal phenomenal preternatural rare spectral supermundane superordinary supranatural transcendental uncomprehensible unearthly unfathomable unintelligible unnatural unrevealed unusual
Antonyms
STRONGEST
earthly hellish usual
STRONG
known
WEAK
existent genuine natural real true
ADJECTIVE
superphysical
Synonyms
WEAK
abnormal celestial concealed dark extramundane extrasensory fabulous fairy ghostly heavenly hidden impenetrable invisible legendary metaphysical miraculous mystic mythical mythological numinous obscure occult paranormal phantom phenomenal preternatural psychic rare secret spectral superhuman superior supermundane superordinary supersensible supranatural transcendental uncanny uncomprehensible unearthly unfathomable unintelligible unknown unnatural unrevealed unusual
ADJECTIVE
supersensible
Synonyms
WEAK
abnormal celestial concealed dark extramundane extrasensory fabulous fairy ghostly heavenly hidden impenetrable invisible legendary metaphysical miraculous mystic mythical mythological numinous obscure occult paranormal phantom phenomenal preternatural psychic rare secret spectral superhuman superior supermundane superordinary superphysical supranatural transcendental uncanny uncomprehensible unearthly unfathomable unintelligible unknown unnatural unrevealed unusual
ADJECTIVE
unaccountable
Synonyms
STRONGEST
arcane impenetrable inexplicable unfathomable unheard-of unintelligible
WEAK
astonishing baffling extraordinary incomprehensible inscrutable mystic odd peculiar puzzling strange uncommon unexplainable unusual unwonted
Antonyms
STRONGEST
comprehensible explainable explicable intelligible normal understandable
WEAK
accountable responsible
ADJECTIVE
uncomprehensible
Synonyms
WEAK
Delphic baffling beats me beyond comprehension beyond one's grasp clear as mud cryptic enigmatic fathomless impenetrable incognizable inconceivable inscrutable mysterious mystifying obscure opaque over one's head perplexing puzzling sibylline unclear unfathomable ungraspable unimaginable unintelligible
ADJECTIVE
unfathomable
Synonyms
STRONGEST
baffling impenetrable incomprehensible indecipherable inexplicable
WEAK
abstruse clear as mud deep enigmatic esoteric heavy incognizable obscure profound too deep uncomprehensible ungraspable unintelligible
Antonyms
STRONGEST
clear comprehensible intelligible understandable
WEAK
believable explainable explicable fathomable
ADJECTIVE
unforeseeable
Synonyms
WEAK
capricious chance chancy changeable fluky from left field incalculable random uncertain unexpected
ADJECTIVE
unimaginable
Synonyms
STRONGEST
extraordinary fantastic impossible improbable incomprehensible inconceivable incredible indescribable rare singular unbelievable uncommon unheard-of unique unthinkable
WEAK
beyond wildest dreams doubtful exceptional inapprehensible incogitable ineffable not understandable unordinary
Antonyms
STRONGEST
bad believable common commonplace conceivable credible customary familiar fathomable normal ordinary plausible poor possible reasonable regular tenable usual
WEAK
describable imaginable
ADJECTIVE
unintelligible
Synonyms
STRONGEST
illegible impenetrable incomprehensible indecipherable meaningless opaque unfathomable vague
WEAK
ambiguous equivocal fathomless inarticulate incognizable incoherent indistinct inexplicit jumbled muddled obscure tenebrous uncertain unclear unexplicit ungraspable unreadable
Antonyms
STRONGEST
clear comprehensible decipherable fathomable intelligible understandable
WEAK
meaningful

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.

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

How much this expertise actually influences the agency’s final decisions is unknowable from the outside.

From The Wall Street Journal • Feb. 18, 2026

The river, at times hauntingly beautiful and others murky and unknowable, offers a mirror to Daniel's torment, and to the increasingly fragile hope of his wife, Agnieszka, that Chris will one day come home.

From Barron's • Jan. 24, 2026

When Lazlo had wished to discover, with Sarai, the realm of the unknowable, he had thought of great, huge mysteries like the origin and nature of gods.

From "Strange the Dreamer" by Laini Taylor