Pity was a feeling of sadness or sympathy for someone who was suffering, distressed, or unhappy.
In 2268, Dr. Miranda Jones said to Captain James T. Kirk, "Shall I tell you what human companionship means to me? A struggle, a defence against the emotions of others. At times, the emotions burst in on me. Hatred, desire, envy, pity. Pity is the worst of all. I agree with the Vulcans. Violent emotion is a kind of insanity." (TOS: "Is There in Truth No Beauty?")