Dictionary
gru•el•ing
Pronunciation: (grOO'u-ling, grOO'ling), [key]—
adj.
exhausting; very tiring; arduously severe:
the grueling Boston marathon.
—
n.
any trying or exhausting procedure or experience.
Also, esp. Brit.,gru'el•ling.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.