The state of being impracticable; impracticability.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "impracticableness" in a sentence
"There may be some who, in a disparaging tone, will at this stage of my confessions enter an accusation of impracticableness."
"It is better to bear the burden of impracticableness, than to stifle conviction and to pare away principle until it becomes more hollowness and triviality."
"Dolly, and with her; and Mrs. Copley, in spite of chewing the cud of mortification at Dolly's impracticableness, was beguiled into forgetting herself."