Definition of the word jealous

The word "jealous" has a rich history that dates back to ancient Greece. The term originated from the Greek word "zelos" (ζήλος), which means "zeal" or "fervor." In its early form, the concept of jealousy was more about being fiercely protective or passionate about something or someone, rather than the negative emotion we associate with it today. The term evolved through Latin as "zelos" and "gelaus," and eventually entered Middle English around the 13th century as "gelous" or "jealous." In the 14th century, the word began to take on its modern connotation, becoming synonymous with envy, resentment, and possessiveness. Over time, the meaning of "jealous" has expanded to include feelings of insecurity, suspicion, and rivalry, but its roots in ancient Greece as a term for zealous passion remain.