The word "jealous" describes a feeling of envy or resentment that occurs when someone perceives a threat to a valued relationship or when they fear losing something they cherish. It often involves a mix of emotion that can include insecurity, fear, and anxiety about potential loss, particularly in friendships or romantic relationships.
The word "jealous" comes from the Old French word jaloux, which means “zealous or envious.” This, in turn, derives from the Latin word zelosus, meaning “zealous,” which is related to zelus, meaning “zeal” or “jealousy.” The concept has evolved over time to include the feelings of envy and insecurity we associate with the word today.