From Old French gruel ( > French gruau), from Frankish *grūt. Compare German Grütze (“grout”), English groats, grit.
gruel (plural gruels)
- A thin, watery porridge; a meal for the poors.
gruel (third-person singular simple present gruels, present participle gruelling or grueling, simple past and past participle gruelled or grueled)
- (transative) to exhaust; use up; disable
- ^ gruel in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913