Definition of "arduous" []

• Demanding great effort or labor; difficult: "the arduous work of preparing a Dictionary of the English Language” ( Thomas Macaulay). (adjective)
• Testing severely the powers of endurance; strenuous: a long, arduous, and exhausting war. (adjective)
• Hard to traverse, climb, or surmount. See Synonyms at burdensome, hard. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "U.S. power officials now say this outage is contained and what they call the arduous process of restoring systems is underway and we have gotten some confirmation of that from our reporters in New York City."
• "Backers of the confirmation measure say they want to ease what they call an arduous chore for midlevel nominees trying to navigate the Senate in a supercharged partisan era."
• "Hassan said his resignation was not caused by any divisions in his economic team but insisted "the reasons behind not wanting to renew his contract is his age and the length of time he has spent in this post which he described as arduous," according to the statement."