unrealizable

[ uhn-ree-uh-lahy-zuh-buh l ]
/ ʌnˈri əˌlaɪ zə bəl /

adjective

incapable of being made actual or real, as an ideal or ambition: His dream of military glory was unrealizable.
incapable of being sensed or understood; unthinkable.

Origin of unrealizable

1830–40; un-1 + realizable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unrealizable