Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of arduousness is as below...

Arduousness :: Arduousness (n.) The quality of being arduous; difficulty of execution.

Difficulty :: Difficulty (n.) The state of being difficult, or hard to do; hardness; arduousness; -- opposed to easiness or facility; as, the difficulty of a task or enterprise; a work of difficulty..

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