C1not organized, skilled, or able to work in a satisfactory way: Existing methods of production are expensive and inefficient.I'm hopelessly inefficient at mending things.Useless and futileinefficiently
/-li/adverb›The hotel is inefficiently run.Useless and futileinefficiency
/-ən.si/noun[C or U]›They were accused of gross inefficiency in their handling of the case.Useless and futile