arduous

About 1.97 uses per million words.

Meaning

1. adjective Needing or using up much energy; testing powers of endurance.

   The movement towards a peaceful settlement has been a long and arduous political struggle.

2. adjective burning; ardent
3. adjective Difficult or exhausting to traverse.

Similar words

laborious toilsome backbreaking labourious gruelling punishing difficult effortful hard straining

Often followed by

and task work journey duties process struggle undertaking than

Word family

arduously arduousness arduousnesses