Seethe is a starting ability for the Sith Inquisitor. It allows the Inquisitor to restore health and force over 15 seconds. It channels for 15 seconds and does not have a cooldown.
This ability is excellent to restore health and force after a fight to ensure that the Inquisitor is ready for the next fight. A bug made this an ultimate power, because in a friendly duel you can use it until you strike. (probably fixed).