The Exile severed her connection at Malachor, creating a 'wound' in the Force. And Traya did kill the Jedi Masters by severing their connection with the Force; it's described and illustrated as something similar to Force drain.
What I was saying about Suppress, though, is that it's not Sever Force, as it's more like a temporary disruption. It doesn't work like you're directly cutting off the opposing Force user's connection to the Force, just interfering with their ability to direct it at you in that moment. The Order 66 episode covering Keeping the Peace, they talked about the power, and how they wanted something that might appeal to Guardians, but they couldn't just reprint Protect, so they thought of Suppress.