stren·u·ous 
/ˈstrɛnjəwəs/ adjective
/ˈstrɛnjəwəs/ adjective [more strenuous; most strenuous] : requiring or showing great energy and effort
▪ Avoid all strenuous exercise until the sprain heals. ▪ a strenuous climb ▪ Today has been a very strenuous day. ▪ strenuous efforts ▪ The proposal has faced strenuous opposition.
▪ Avoid all strenuous exercise until the sprain heals. ▪ a strenuous climb ▪ Today has been a very strenuous day. ▪ strenuous efforts ▪ The proposal has faced strenuous opposition.
— stren·u·ous·ly adverb
