What is opportunist? How to use in English

The word "opportunist" has its roots in Latin. The Latin phrase "opportunistus" means "one who seizes opportunities," which is derived from "opportunitas," meaning "opportunity" and the suffix "-istus," which forms a noun indicating a person who does something. This Latin phrase was later adopted into Middle French as "opportunist," and from there it was borrowed into English in the 17th century. In English, the word initially referred to someone who takes advantage of opportunities, but over time its meaning evolved to encompass a negative connotation of someone who takes advantage of situations for personal gain, often without regard for ethics or morality. Today, an opportunist is often used to describe someone who is perceived as selfish, cunning, or exploitative.