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arduo

arduous, grueling

adjective AHR-dwoh Rare

Origin: Latin arduus (steep, difficult)

Usage Note

Arduo describes tasks requiring great effort — physical, intellectual, or logistical. It is a formal, written-register adjective; everyday speech more often uses difícil or duro. Commonly paired with tarea ardua (arduous task) or trabajo arduo (grueling work).

Examples

"Fue un camino arduo hasta la cima."

Natural Translation

It was an arduous path to the summit.

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