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
Vain
Vain adjective - Producing no results.
Usage example: all their efforts to escape proved vain
Both words in one sentence
-
The only one able to set them straight is Detective Van Zwam and Agent Gaston, who is dumb, vain, opportunistic, yet efficient.
Source: Comic Strip / Nero
Cite this Source
Vain and Efficient. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/efficient/vain
Efficient & Vain. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/efficient/vain>.
Vain or Efficient. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/efficient/vain.
Google Ngram Viewer shows how "efficient" and "vain" have occurred on timeline