arduous, difficult
| Masculine | Feminine | |
|---|---|---|
| Singular | — | ardua |
Winter will be harsh.
Tu arduo trabajo está dando sus frutos.
Your hard work is paying off.
Debe de haber sido un viaje largo y arduo.
It must have been a long and arduous journey.
— Drácula (2025)
Tom está acostumbrado al trabajo arduo.
Tom is used to hard work.