Jealousy was an emotion that refered to the thoughts, feelings, and behaviors that occurred when a person believed a valued relationship was being threatened by a rival.

In order to free himself and his crew from the Kelvans, Captain James T. Kirk aroused feelings of jealousy in the as-yet emotionally immature aliens – Kirk caused Rojan to become jealous by seducing Kelinda. (TOS: "By Any Other Name")

External link Edit

• Jealousy at Wikipedia