'Strenuous' definitions:

Definition of 'strenuous'

(from WordNet)
adjective
Characterized by or performed with much energy or force; "strenuous exercise"
adjective
Taxing to the utmost; testing powers of endurance; "his final, straining burst of speed"; "a strenuous task"; "your willingness after these six arduous days to remain here"- F.D.Roosevelt [syn: arduous, straining, strenuous]

Definition of 'Strenuous'

From: GCIDE
  • Strenuous \Stren"u*ous\, a. [L. strenuus; cf. Gr. ? strong, hard, rough, harsh.] Eagerly pressing or urgent; zealous; ardent; earnest; bold; valiant; intrepid; as, a strenuous advocate for national rights; a strenuous reformer; a strenuous defender of his country. [1913 Webster]
  • And spirit-stirring wine, that strenuous makes. --Chapman. [1913 Webster]
  • Strenuous, continuous labor is pain. --I. Taylor. [1913 Webster] -- {Stren"u*ous*ly}, adv. -- {Stren"u*ous*ness}, n. [1913 Webster]