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.

And spirit-stirring wine, that strenuous makes. --Chapman.

Strenuous, continuous labor is pain. --I. Taylor. -- Stren"u*ous*ly, adv. -- Stren"u*ous*ness, n.

Source: Webster's Revised Unabridged Dictionary (1913)