- exhausting; very tiring; arduously severe: the grueling Boston marathon.
- any trying or exhausting procedure or experience.
Also especially British, gru·el·ling.
Origin of grueling
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for gruelling
Harry, the expedition patron, announced last month that he will join the gruelling 210-mile trek across Antarctica this winter.Thanks Bro! Royal Charity Donates £100,000 to Harry's South Pole Mission
May 13, 2013
It was a gruelling four years' struggle, but with success at the end of it.Herbert Hoover
Natalie insisted on camping early; for it had been a gruelling afternoon on Garth.Two on the Trail
The place was a rest billet, which we had just reached after a gruelling on the Somme.
But they were met by a gruelling volley, and with the cry of "No quarter!"Famous Indian Chiefs
Charles H. L. Johnston
The final bout of fireworks was a gruelling for both champions.Ulysses
- severe or tiringa gruelling interview
- informal a severe experience, esp punishment
C19: from now obsolete vb gruel to exhaust, punish
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for gruelling
also grueling, "exhausting, punishing," 1891, from late 18c. slang get one's gruel "receive one's punishment," from gruel.
Online Etymology Dictionary, © 2010 Douglas Harper