Meaning of grueling

gru•el•ing

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