To invest in English means to use money or capital to gain profitable returns, typically by purchasing assets such as stocks, bonds, or real estate. The word "invest" comes from the Latin word "investire," which means "to clothe" or "to surround," and originally referred to the act of putting on clothing or surrounding oneself with protective clothing.

Here are some examples of how "to invest" can be used in English sentences:

- I decided to invest some of my savings in a new business venture.

- The company is looking for investors to help fund its latest project.

- We recommend that you invest in a diversified portfolio of stocks and bonds to minimize risk.

- He has made a lot of money by investing in real estate and stocks.

- She is considering investing in a mutual fund to save for retirement.