Arduous in English
- arduous⇄adv. arduously.
- arduous⇄arduous, adjective.
1. hard to do; requiring much effort; difficult.
Ex. an arduous lesson.
(SYN) laborious.
2. using up much energy; strenuous.
Ex. He enjoys an arduous workout in the gymnasium.
3. hard to climb; st - arduous⇄noun arduousness.