Inefficacy n. Lack of power to produce the desired or proper effect; inefficiency; ineffectualness; futility; uselessness; fruitlessness; as, the inefficacy of medicines or means. "The seeming inefficacy of censures.""The inefficacy was soon proved, like that of many similar medicines."
... said Mildred, conscious of the inefficacy of any other appeal, "that Mr. Thomas has promised to pay the legacies that Sir Wycherly intended ... — The Two Admirals • J. Fenimore Cooper
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