arduous in Finnish
arduous in Finnish
ankara
Needing or using up much energy; testing powers of endurance.
rasittava
Needing or using up much energy; testing powers of endurance.
työläs
Needing or using up much energy; testing powers of endurance.
uuvuttava
Needing or using up much energy; testing powers of endurance.
vaivalloinen
Needing or using up much energy; testing powers of endurance.
jyrkkä
Difficult or exhausting to traverse.
vaativa
Difficult or exhausting to traverse.