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WordNet-OnlineFree dictionary and thesaurus of English. Definitions, synonyms, antonyms and more...
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Adjective inefficient has 2 senses
inefficient - not producing desired results; wasteful; "an inefficient campaign against drugs"; "outdated and inefficient design and methods"Antonyms:  efficient, businesslike, cost-efficient, cost-effective, economic, economical, expeditious, prompt, timesaving, high-octane, streamlined, underspent
 
ineffective, inefficient - lacking the ability or skill to perform effectively; inadequate; "an ineffective administration"; "inefficient workers"Antonym:  competent (indirect, via incompetent)
 
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