Found 2 items, similar to gruelling.
English → English (WordNet) Definition: gruelling gruelling adj : characterized by toilsome effort to the point of exhaustion; especially physical effort; “worked their arduous way up the mining valley”; “a grueling campaign”; “hard labor”; “heavy work”; “heavy going”; “spent many laborious hours on the project”; “set a punishing pace” [syn: arduous, backbreaking, grueling, hard, heavy, laborious, punishing, toilsome]
English → English (gcide) Definition: gruelling grueling \grueling\, gruelling \gruelling\adj. 1. characterized by toilsome effort; requiring extreme physical or mental effort; as, a grueling campaign. Syn: arduous, backbreaking, back-breaking, exhausting, gruelling, hard, heavy, laborious, labourious, punishing, slavish, strenuous, toilsome. [WordNet 1.5]