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Dictionary

ar•du•ous

Pronunciation: (är'jOO-us or, esp. Brit., är'dyOO-), [key]
—adj.
1. requiring great exertion; laborious; difficult: an arduous undertaking.
2. requiring or using much energy and vigor; strenuous: making an arduous effort.
3. hard to climb; steep: an arduous path up the hill.
4. hard to endure; full of hardships; severe: an arduous winter.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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