Arduous
[adj] difficult to accomplish; demanding considerable mental effort and skill; "the arduous work of preparing a dictionary"
[adj] 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 punishing pace"
[adj] 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
Related Information
Synonyms
backbreaking, difficult, effortful, grueling, gruelling, hard, heavy, laborious, labourious, punishing, straining, strenuous, toilsome
Related Terms
abrupt, abstruse, backbreaking, brutal, burdensome, complex, critical, crushing, delicate, demanding, difficile, difficult, effortful, energetic, exacting, exhausting, fatiguing, forced, formidable, grueling, hairy, hard, heavy, hefty, Herculean, intricat