Formal:
* Polymath: This is the most common and accurate term, emphasizing broad knowledge and skills.
* Renaissance person: This refers specifically to someone with knowledge and skills across various fields during the Renaissance period, but it's often used figuratively.
* Multifaceted: Emphasizes having many different aspects or qualities.
* Versatile: Highlights the ability to adapt and perform well in different situations.
* Erudite: Describes someone with deep and extensive knowledge.
Informal:
* Jack of all trades: This implies someone with basic skills in many areas, but not necessarily expert in any.
* Well-rounded: Suggests a balance of knowledge and skills.
* Multitalented: Focuses on having many talents.
* Generalist: Emphasizes a broad understanding rather than specialization.
The best word to use depends on the specific context and the individual's skills and knowledge.