General curiosity:
* Curieux/curieuse (masculine/feminine) - This is the most common and direct translation of "curious."
* Intrigué(e) - This implies a more specific kind of curiosity, often sparked by something mysterious or interesting.
* Intéressé(e) - This translates to "interested" and can be used to express curiosity about a particular topic or subject.
Other related phrases:
* Avide de savoir - This means "eager to learn" and expresses a strong desire for knowledge.
* Avoir envie de savoir - This translates to "want to know" and suggests a desire to understand something better.
The best translation will depend on the specific situation and the nuance you want to convey.