unknowable
[adjective]
Synonyms: incomprehensible, impenetrable, incognizable, uncomprehensible, unfathomable, ungraspable, unintelligible, inconceivable, unimaginable, ununderstandable, mysterious, arcane, cabalistic, inscrutable, mysterial, mystic, numinous, unexaminable, unguessed

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Antonyms: knowable

[TahlilGaran] English Synonym Dictionary ▲

unknowable adjective

1. that cannot be known
   • ● a distant, unknowable divine power

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[TahlilGaran] English Dictionary ▲