T'san s'at

From Memory Alpha, the free Star Trek reference

T'san s'at is the intellectual deconstruction of emotional patterns, the process by which Vulcans are able to control their emotions. It is a life-long process.

In 2373, Harry Kim asked Tuvok to teach him the techniques of t'san s'at in order to deal with his attraction to Marayna, then believed to be a holographic character. (VOY: "Alter Ego")