arduous (verb)
A jornada através da floresta foi uma tarefa árdua para os exploradores.
"Moving all the furniture to the third floor by ourselves was an arduous process."
Think of 'AR-DU-OUS' as 'A Real Difficult Unit Of US'. It takes a lot of 'us' to finish a difficult task.
Using 'arduous' for a person. → He is a hardworking man.
Spelling it as 'ardous'. → arduous
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