adjective. characterized by effort to the point of exhaustion; especially physical effort.
Sentences with gruelling
1. Verb, gerund or present participle
Writing a letter to someone you feel has betrayed you often is an upsetting and gruelling task that involves painful emotions most people would rather forget.
Even if gruelling exercise is required for the sport the student-athlete plays, it will be a means to an end in that she's doing it to get better at the sport she enjoys.