impractical

From im- +‎ practical.

• IPA^(key): /ɪmˈpɹæktɪkəl/

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impractical (comparative more impractical, superlative most impractical)

1. not practical; impracticable

   Antonym: practical

   • 1914, Edgar Rice Burroughs, Tarzan of the Apes:

     "I can't leave you here alone with these cutthroats, and you certainly can't venture into the jungle with me; yet someone must go in search of your father. He is more than apt to wandering off aimlessly, regardless of danger or direction, and Mr. Philander is only a trifle less impractical than he. ...

• Said of people, theories, philosophies, etc.