strenuous
Translation
strenuous, arduous, demanding
Examples
He made a strenuous effort to finish.
He made a strenuous effort to finish.
Avoid strenuous exercise in hot weather.
Avoid strenuous exercise in hot weather.
Grammar Patterns
a strenuous ((noun)) requiring great effort or energy He made a strenuous effort to finish.
Similar Words
Synonyms: arduous, demanding, difficult; Antonyms: easy, effortless
Etymology
From Latin 'strenuus' meaning 'brisk, active, vigorous'. The '-ous' suffix means 'full of'.
Memory Tips
It sounds a bit like 'strain us'. A strenuous task is one that will 'strain us'.