inconceivable, incomprehensible, incredible, inapprehensible, ineffable, unbelievable, unheard of, indescribable, unthinkable, beyond comprehension, improbable; see also impossible 1.
Antonyms imaginable*, conceivable, comprehensible.
"unimaginable." YourDictionary, n.d. Web. 26 February 2019. <https://thesaurus.yourdictionary.com/unimaginable>.
unimaginable. (n.d.). Retrieved February 26th, 2019, from https://thesaurus.yourdictionary.com/unimaginable
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