arduous: Meaning and Definition of

ar•du•ous

Pronunciation: (är'j-us or, esp. Brit., är'dy-), [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.
See also:
ARDS are
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