ˈstrenyəwəs adjective
Etymology: Latin strenuus — more at stare
1.
a. : vigorously active : energetic
to hustle and to be strenuous … seem to be prominent American virtues — M.R.Cohen
a tender sort of fancy rather than a strenuous imagination — F.J.Mather
implement the Full Employment Act by strenuous measures — New Republic
b. : intensely eager : fervent , zealous
a family of intellectual energy and strenuous Puritanism — F.A.Christie
2. : full of power : lusty , loud
a mud puddle in strenuous motion — Nathaniel Hawthorne
the recorded tone is exemplary, even in the most strenuous fortissimo — Edward Sackville-West & Desmond Shawe-Taylor
3.
a. : marked by or calling for physical energy or stamina : arduous , rigorous
relaxing … after a strenuous day's work — Hervey Allen
fog, high seas, and strong winds made the crossing a strenuous one — M.M.Hunt
b. : marked by unusual difficulty or tension : hard , exacting
a strenuous examination
his occupation is sedentary from a physical standpoint, strenuous from a nervous and mental standpoint — H.G.Armstrong
Synonyms: see vigorous