Efficient
Efficient adjective - Producing or capable of producing a desired result.
Usage example: that manual lawn mower is not a very efficient tool for doing a huge yard
Inefficient
Inefficient adjective - Not producing the desired result.
Usage example: inefficient measures to solve the problem of teenage smoking
Nearby Words: inefficiency, inefficiently
Both words in one sentence
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There's little inefficient about him, however - his battle strategy of "paralyze enemy, then spam pain spells until they die" is very efficient and effective indeed.
Source: Video Game / Dungeon Crawl - While the Imperium's ruling body is often quite inefficient, it's unclear whether an empire spanning half the galaxy could be any more efficient under a less brutal and oppressive regime.
Source: Repressive but Efficient - He sought to show, sometimes Anviliciously, that American democracy, as inefficient as it often is, is infinitely preferable to the "efficient" tyranny of Communist regimes.
Source: Democracy Is Flawed
Cite this Source
Inefficient and Efficient. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/efficient/inefficient
Efficient & Inefficient. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/efficient/inefficient>.
Inefficient or Efficient. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/efficient/inefficient.
Google Ngram Viewer shows how "efficient" and "inefficient" have occurred on timeline