gruelling

Từ điển Oxford Learners Wordfinder Dictionary

adjective

characterized by 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, operose, punishing, toilsome
• Similar to:
effortful
• Derivationally related forms:
toilsomeness (for: toilsome), operoseness (for: operose), labor (for: laborious), laboriousness (for: laborious), heaviness (for: heavy), hardness (for: hard), arduousness (for: arduous)