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Dictionary definition for: Arduous

1. (s) 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

2. (s) taxing to the utmost; testing powers of endurance; "his final, straining burst of speed" "a strenuous task" "your willingness after these six arduous days to remain here"- F.D.Roosevelt

3. (s) difficult to accomplish; demanding considerable mental effort and skill; "the arduous work of preparing a dictionary"

WordNet 2.1 Copyright Princeton University. All rights reserved.