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Từ điển WordNet v3.1 - WordNet Dictionary
gruelling
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)
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