elbow grease

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WordNet Dictionary
	Definition:		[n]  use of physical or mental energy; hard work; "he got an A for effort"; "they managed only with great exertion"
	Synonyms:		effort, exertion, sweat, travail
	See Also:		application, detrition, difficulty, diligence, exercise, exercising, friction, labor, labour, least effort, least resistance, overexertion, overkill, physical exercise, physical exertion, pull, rubbing, strain, straining, struggle, supererogation, toil, trouble, workout