Hate, or hatred, was a negative emotion considered to be the opposite of love. This emotion was triggered by a persistent feeling of being threatened, disgust, anger, or irritation towards the hostility. It will be even more intense and deeper than anger, with it becoming in some cases a revengeful grudge. The cause of the hate will become deep-rooted and will last a while. An individual filled up with hate impulses will develop even more intense emotions such as revenge and strong disgust.
In Vok'sha mythology, hate was a beast that lived inside the stomach. (VOY: "Heroes and Demons")
Armus was the personification of hate. (TNG: "Skin Of Evil")
The Talosians were unable to read through "primitive emotions" such as hate. (TOS: "The Cage")
Major Kira Nerys hated holosuites. (DS9: "Meridian")