Strenuous
/ˈstrɛn.ju.əs/noun
Requiring or using great effort or exertion.
Did you know?Interestingly, the Latin root 'strenuus' not only means vigorous but also relates to the idea of being energetic and active, akin to a vital force in ancient practices.
Etymological Timeline
Proto-Indo-European
PIE
*streg-
“to stretch, strive, or exert oneself.”
Latin
Latin
strenuus
“energetic, vigorous, strong.”
Old French
Old French
estrenous
“active, vigorous.”
14th Century
Middle English
strenious
“characterized by great effort or exertion.”
Modern English
English
strenuous
“requiring or using great effort or exertion.”