Inefficient
Inefficient adjective - Not producing the desired result.
Weak is a synonym for inefficient in characteristic topic. In some cases you can use "Weak" instead an adjective "Inefficient", when it comes to topics like incompetent, wasteful, impotent.
Nearby Words: inefficiency, inefficiently
Weak
Weak adjective - Lacking bodily strength.
Inefficient is a synonym for weak in impotent topic. You can use "Inefficient" instead an adjective "Weak".
Mutual synonyms
Related pairs
Both words in one sentence
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Her attacks are weak and inefficient and, if she isn't being bailed out by Cure Fortune, she's losing ground to the bad guys of the series.
Source: The Chosen Zero - The way he fights tends to be ludicrously inefficient against weaker opponents, though, which provides a legitimate flaw for somebody who's Weak, but Skilled to exploit.
Source: Strong as They Need to Be -
Fascist, but Inefficient: Whenever the Templars take full control of an area, they tend to run it into the ground due to their "keep the people weak" policy weakening the nation as a whole.
Source: Franchise / Assassin's Creed
Cite this Source
Weak and Inefficient. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/inefficient/weak
Inefficient & Weak. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/inefficient/weak>.
Weak or Inefficient. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/inefficient/weak.
Google Ngram Viewer shows how "inefficient" and "weak" have occurred on timeline