demoraliser BrE
demoralizer AmE

So that Salut itself has to intervene, and forbid him: "Wilt thou demoralise the Guillotine," asks Collot, reproachfully, "demoraliser le supplice!"

The laser sight was a further demoralizer.

Opener 'Demoralizer' is an excellent grinder with solid rhythms and a smooth integration of breathy string bends that are almost psychedelic.