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Definitions of arduous:
  • adjective:   difficult to accomplish; demanding considerable mental effort and skill
    Example: "The arduous work of preparing a dictionary"
  • adjective:   characterized by toilsome effort to the point of exhaustion; especially physical effort
    Example: "Worked their arduous way up the mining valley"
  • adjective:   taxing to the utmost; testing powers of endurance
    Example: "Your willingness after these six arduous days to remain here- F.D.Roosevelt"

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See arduous used in context: 10 definitions

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