ef·fi·cient·ly | \ i-ˈfi-shənt-lē 
\
\Definition of efficiently
: in an efficient manner : with success, competence, or adequate effect
working/operating efficiently finding ways to use fuel more efficiently Service is efficiently friendly, and the waitstaff knows the menu inside out.— Harvey Steiman At higher elevations, lower air pressure makes it tough for the human body to use oxygen as efficiently as normal.— Dennis Coello
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The first known use of efficiently was in 1775
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