Definition of "grueling" []

• Physically or mentally demanding to the point of exhaustion: a grueling campaign. (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.

• "Men's tennis players, frustrated by what they describe as a grueling playing calendar and unfairness in the distribution of prize money, are rallying against the sport's governing bodies."
• "Both players put in grueling offseason conditioning work to make it happen."
• "Q: How grueling is the physical aspect of shooting the show?"