ex·er·tion

[ig-zur-shuhn]
noun
1.
vigorous action or effort: physical and mental exertion.
2.
an effort: a great exertion to help others.
3.
exercise, as of power or faculties.
4.
an instance of this.
Origin:
1660–70; exert + -ion

Related forms
non·ex·er·tion, noun
self-ex·er·tion, noun
su·per·ex·er·tion, noun

Synonyms
1. endeavor, struggle, attempt, activity, strain. See effort.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To exertion
00:10
Exertion is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
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Collins
World English Dictionary
exert (ɪɡˈzɜːt) [Click for IPA pronunciation guide]
 
—vb
1.  to use (influence, authority, etc) forcefully or effectively
2.  to apply (oneself) diligently; make a strenuous effort
 
[C17 (in the sense: push forth, emit): from Latin exserere to thrust out, from ex-1 + serere to bind together, entwine]
 
ex'ertion
 
—n
 
ex'ertive
 
—adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

exertion
1660s, from exert + -ion.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The heart becomes thicker-walled from having to pump against the pressure, and
  less able to respond to the demands of exertion.
Technically, the horses would produce somewhat more carbon dioxide because of
  the increased exertion and stress.
The familiar nodding motion of her head suggests both exertion and
  determination.
Each volunteer's heart function was measured before exercise and at peak
  exertion on a treadmill.
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