The story
From present participle of gruel (“to exhaust, punish”), from gruel (noun).
Etymology from Wiktionary, CC BY-SA 4.0.
gruelling
gru·el·ingToday it means: Very difficult or taxing; exhausting; backbreaking. Full definition →
Today it means: Very difficult or taxing; exhausting; backbreaking. Full definition →
From present participle of gruel (“to exhaust, punish”), from gruel (noun).
Etymology from Wiktionary, CC BY-SA 4.0.