arduous

US /ˈɑːr.dʒu.əs/
UK /ˈɑːr.dʒu.əs/
"arduous" picture
1.

arduo, difficile, faticoso

involving or requiring strenuous effort; difficult and tiring

:
•
The climb up the mountain was long and arduous.
La salita sulla montagna è stata lunga e ardua.
•
Learning a new language can be an arduous process.
Imparare una nuova lingua può essere un processo arduo.
:
difficulthardonerousstrenuouslaborioustaxinggruelingexhaustingtiringdemandingtoughformidablechallengingburdensomebackbreaking