vigorous action or effort

physical and mental exertion.

an effort

a great exertion to help others.

exercise, as of power or faculties.

an instance of this.

noun

idleness , laziness

noun

action , activity , application , attempt , effort , elbow grease * , employment , endeavor , exercise , hard pull , industry , labor , long pull , operation , pains , strain , stretch , striving , struggle , toil , travail , trial , trouble , use , utilization , implementation , play , usage , pain , while , dint , elbow grease , energy , power , pull , strength , work