| a. | 1. | Not efficient; not producing the effect intended or desired, or achieiving the effect by unnnecessary and excessive expenditure of resources; inefficacious; |
| 2. | Incapable of, or indisposed to, effective action; habitually slack or remiss; effecting little or nothing; |
| Adj. | 1. | inefficient - not producing desired results; wasteful; "an inefficient campaign against drugs"; "outdated and inefficient design and methods" Antonyms: efficient - being effective without wasting time or effort or expense; "an efficient production manager"; "efficient engines save gas" |
| 2. | inefficient - lacking the ability or skill to perform effectively; inadequate; "an ineffective administration"; "inefficient workers" Synonyms: ineffective |