carefulness caution cautiousness circumspection precaution prudence wariness cessation idleness inaction inactivity indolence inertia inutility laziness passivity repose rest stoppage uselessness honesty truthfulness ignorance frankness futility impracticality incapability ineffectiveness ineffectuality ineffectualness inefficacy inefficiency inadequacy incompetence ineptness pointlessness unworkability fruitlessness unsuccessfulness worthlessness inoperability mistake aberration oversight bungle blunder clanger erratum miscalculation misjudgement misjudgment slip underestimation misapplication misapprehension blooper error fault flub fluff misstep muddle snafu trip