hard
US /hɑːrd/
UK /hɑːrd/

1.
duro, sólido
solid, firm, and resistant to pressure; not easily broken, cut, or pierced
:
•
The ground was hard from the frost.
O chão estava duro por causa da geada.
•
Diamonds are the hardest known natural material.
Diamantes são o material natural mais duro conhecido.
2.
difícil, complicado
difficult to do, understand, or deal with
:
•
It was a hard decision to make.
Foi uma decisão difícil de tomar.
•
The exam was really hard.
A prova foi realmente difícil.
1.
duro, forte
with a great deal of effort or intensity
:
•
He worked hard to finish the project on time.
Ele trabalhou duro para terminar o projeto a tempo.
•
It rained hard all night.
Choveu forte a noite toda.
2.
com dificuldade, dificilmente
with difficulty
:
•
He breathed hard after running the marathon.
Ele respirava com dificuldade depois de correr a maratona.
•
She found it hard to believe his story.
Ela achou difícil acreditar na história dele.