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Noun: exertion  ig'zur-shun or eg'zur-shun
  1. Use of physical or mental energy; hard work
    "they managed only with great exertion";
    - effort, elbow grease, travail [literary], sweat [informal]

Derived forms: exertions

Type of: labor [US], labour [Brit, Cdn], toil

Encyclopedia: Exertion