ˈär]jəwəs, ˈȧ], Brit usually & US sometimes ]dyəw-\ adjective
Etymology: Latin arduus high, steep, difficult; akin to Old Norse örthigr, örthugr high, steep, bold, Old Irish ard high, tall, Tocharian A orto up, Avestan ərədva high
1.
a. : hard to accomplish or achieve : difficult , onerous
building a college curriculum … is a long, arduous , and difficult task — J.P.Leonard
b. : marked by great labor or effort : strenuous , exacting
determined to save him from a life of arduous toil — A.C.Cole
2. : hard to climb : steep , lofty
those arduous paths they trod — Alexander Pope
3. : hard to endure : full of difficulties and hardships : trying
your willingness after these six arduous days to remain here — F.D.Roosevelt
Synonyms: see hard