Arduous(a.) Steep and lofty, in a literal sense; hard to climb.
Arduous(a.) Attended with great labor, like the ascending of acclivities; difficult; laborious; as, an arduous employment, task, or enterprise.
Arduously(adv.) In an arduous manner; with difficulty or laboriousness.
Arduousness(n.) The quality of being arduous; difficulty of execution.
Words within arduously