* Difficult: This is the most common and straightforward translation.
* Hard: Similar to "difficult," but can also imply physical difficulty.
* Challenging: This emphasizes the potential for growth and overcoming the obstacle.
* Tough: This suggests resilience and the ability to handle a difficult situation.
* Complicated: This refers to a complex or intricate issue.
Ultimately, the best translation depends on the specific situation and the intended meaning.