See exertion in Webster's New World Roget's A-Z Thesaurus II
noun
The act of putting into play:
application, employment, exercise, implementation, operation, play, usage, use, utilization. See usedThe use of energy to do something:
effort, endeavor, pain (used in plural), strain1, striving, struggle, trouble, while. (Informal) elbow grease. See workEnergetic physical action:
activity, exercise. See action
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