arduous
/ˈɑːdjuːəs//ˈɑːɹd͡ʒuəs/
adjective
- 1
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
Burning; ardent
- 3
Difficult or exhausting to traverse.
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