arduous

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

árduo, difícil, cansativo

involving or requiring strenuous effort; difficult and tiring

:
•
The climb up the mountain was long and arduous.
A subida da montanha foi longa e árdua.
•
Learning a new language can be an arduous process.
Aprender um novo idioma pode ser um processo árduo.
:
difficulthardonerousstrenuouslaborioustaxinggruelingexhaustingtiringdemandingtoughformidablechallengingburdensomebackbreaking