Entrepreneur (noun)

1. A person who organizes and operates a business venture and assumes much of the associated risk.
2. A person who starts their own business, especially when it involves taking a financial risk.

Origin:

From french entrepreneur, from entreprendre ("to undertak.e")

Examples:

1. Steve Jobs was a successful entrepreneur and the co-founder of Apple.
2. Mark Zuckerberg is an entrepreneur who founded Facebook.
3. He became an entrepreneur after losing his job during the recession.
4. She is an entrepreneur who started her own fashion line.
5. Entrepreneurs are the backbone of the economy.