To do something that requires great physical or mental effort
After a late Saturday night party, cooking on a Sunday morning seems arduous.
Setting up a whole new business in an arduous activity as it demands a lot of physical and mental skills.
Think before you take up this adventurous task, it’s an arduous one, it may cost you your health.
Teaching isn’t physically arduous, but it requires a lot of patience and tolerance.
The actress underwent an arduous fitness program to look fit for her new ad campaign.
Working in a coral mine requires arduous physical exertion.
Lifting heavy boxes is a very arduous job for a skinny woman.
Clearing up the entire house after the lavish party, was an arduous task.