1. Not producing desired results; wasteful
   "an inefficient campaign against drugs"; "outdated and inefficient design and methods" 
2. Lacking the ability or skill to perform effectively; inadequate
   "inefficient workers"
   - ineffective

See also: incompetent, ineffective, ineffectual, inefficiency, inefficiently, uneconomical, uneffective, wasteful

Antonym: efficient

Encyclopedia: Inefficient

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• round-trip ticket
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• rounded
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