needing a lot of effort or strength
Strenuous is an adjective. Strenuous means requiring or using great exertion.
Strenuous exercise makes me tired.
The base word of "strenuous" is "strength."
Strenuous exercise is good for your heart.
The workout was quite strenuous.
Strenuous describes hard and extended physical exertion or exercise.
Too much strenuous exercise can result in jury.
The strenuous exercise made my muscles ache.
He lifted the boulder, but not without heavy exertion.you can not win without exertion . Your highest exertion is required.
Some of the days are quite long, and the walking feels more strenuous at altitude.
Building the house was a strenuous job, but John's love of hard work showed through.
Burning felt (a type of fabric) has nothing to do with strenuous activity.