Grueling is a 8 letter English word. It's valid Scrabble word worth 10 points. It's valid Words with friends word worth 15 points.
You can make 186 anagrams from letters in grueling (eggilnru).
1850-55; slang gruel punishment (noun), punish (v.) + -ing2, -ing1
I had a grueling battle with him, and at the end of two hours and fifty minutes he broke my hook.
Some might lack the fortitude—or masochism—required to endure a grueling campaign (Rubio).
Not one day, scarcely one hour had been free of grueling labor.
Jaguar scored epic wins at the grueling Le Mans 24-hour race.
It isn't a grueling competition like the 'Open' or even the 'Limit.'
In a grueling two-hour questioning, Carter provided testimony as to why the drug can be useful in pain management.
After 15 hours of grueling interrogations, he was brought before judges and placed under formal investigation.
In June 1909, Model Ts were two of the first three finishers in a grueling New York-to-Seattle rally.
With him to show the way the swamp became merely a hard, grueling mush through boggy lowlands.
However, it was at Pond Farm we had some of our most grueling experiences.