- Steep and lofty, in a literal sense; hard to climb. - Attended with great labor, like the ascending of
acclivities; difficult; laborious; as, an arduous employment, task, or
enterprise.
Meaning of 'arduous' (Princeton's WordNet)
1 . arduous
[ s]
Meaning (1): - characterized by effort to the point of exhaustion; especially physical effort
Example in sentence:
a grueling campaign;
hard labor;
heavy going;
heavy work;
set a punishing pace;
spent many laborious hours on the project;
worked their arduous way up the mining valley
Meaning (2): - taxing to the utmost; testing powers of endurance
Example in sentence:
a strenuous task;
his final, straining burst of speed;
your willingness after these six arduous days to remain here
Meaning (3): - difficult to accomplish; demanding considerable mental effort and skill