Dictionary
stren•u•ous
Pronunciation: (stren'yOO-us), [key]—
adj.
1. characterized by vigorous exertion, as action, efforts, life, etc.:
a strenuous afternoon of hunting.
2. demanding or requiring vigorous exertion; laborious:
To think deeply is a strenuous task.
3. vigorous, energetic, or zealously active:
a strenuous person; a strenuous intellect. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.