strenuous
//ˈstrɛnjuəs//
Adjective
strenuousCanonical form
more strenuousComparative
most strenuousSuperlative
1
Requiring or using great effort, energy, or exertion.
Climbing the mountain was a strenuous activity that left us exhausted.
2
Vigorously active; energetic or zealous.
She made strenuous efforts to improve her skills.