This is the 11820th most frequent Spanish word.
hard
The Spanish word for "hard" is "duro," meaning "firm, solid, or difficult to penetrate or endure."
In this sentence, 'hard' refers to the difficulty of the problem.
Este problema es muy difícil de resolver.
This problem is very hard to solve.
Here, 'hard' describes the physical hardness of the wood.
La madera de este árbol es muy dura.
The wood of this tree is very hard.
In this case, 'hard' expresses intensity and effort in their work.