'desensitise' definitions:

Definition of 'desensitise'

(from WordNet)
verb
Cause not to be sensitive; "The war desensitized many soldiers"; "The photographic plate was desensitized" [syn: desensitize, desensitise] [ant: sensitise, sensitize]
verb
Make insensitive; "His military training desensitized him" [syn: desensitize, desensitise] [ant: sensibilise, sensibilize, sensify, sensitise, sensitize]

Definition of 'desensitise'

From: GCIDE
  • desensitise \desensitise\ v. t. same as desensitize.
  • Syn: deaden. [WordNet 1.5]