The quality of being unavailing or unprofitable.(noun)
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Use "bootlessness" in a sentence
"Daniel made no effort to conceal his bootlessness when the guests rose to leave the table; without giving the astonishment of his companions a single thought, he once more drew the patent leather torturers on to his extremities."
"Selene had been convinced from the first of the bootlessness of the attempt, and was now anxious to bring the transaction to a speedy conclusion, as the hour was approaching when she and Arsinoe had to go to the papyrus factory."