1. A test, examination, or challenging task that is hard to complete or pass
The final exam was a difficult test that required months of preparation.
A prova final foi uma prova difícil que exigiu meses de preparação.
2. Evidence or documentation that is challenging to obtain or verify
Finding difficult proof of the crime took the investigators weeks.
Encontrar prova difícil do crime levou semanas para os investigadores.
3. A challenging trial or ordeal that tests one's abilities or character
Overcoming illness was a difficult test of her strength.
Superar a doença foi uma prova difícil de sua força.