Efficient and Useless

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

Useless is an antonym for efficient in adept topic.

Nearby Words: efficiency, efficiently, efficacy

Useless

Useless adjective - Producing no results.
Usage example: a useless attempt to reach an agreement

Efficient is an antonym for useless.

Nearby Words: use, useful, uselessly

Both words in one sentence

  • Film / Moonraker These smaller engines are intended only for orbital adjustments and initiating re-entry using carefully timed burns - effective and efficient in a vacuum, but nearly useless in atmosphere.
  • The Grand Finale reveals that when Dwight becomes regional manager he actually fires the incompetent and useless people like Kevin and Toby and the branch becomes much more efficient as a result.
  • Video Game / MechWarrior Death of a Thousand Cuts: The lowly Machine Gun, the quintessential useless peashooter is, per unit of heat produced and ton of ammo consumed, the most efficient weapon.
Cite this Source
Useless and Efficient. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/efficient/useless
Efficient & Useless. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/efficient/useless>.
Useless or Efficient. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/efficient/useless.
Google Ngram Viewer shows how "efficient" and "useless" have occurred on timeline