"arduos" is probably misspelled. Trying arduous instead Definition of arduous
1
[ adjective ] characterized by toilsome effort to the point of exhaustion; especially physical effort

Examples

"worked their arduous way up the mining valley" "a grueling campaign" "hard labor" "heavy work" "heavy going" "spent many laborious hours on the project"

2
[ adjective ] taxing to the utmost; testing powers of endurance

Synonyms

straining strenuous

Examples

"his final, straining burst of speed" "a strenuous task" "your willingness after these six arduous days to remain here"- F.D.Roosevelt

3
[ adjective ] difficult to accomplish; demanding considerable mental effort and skill

Examples

"the arduous work of preparing a dictionary"

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