desensitising (Adjective) — Making less susceptible or sensitive to either physical or emotional stimuli. ex. "Thus, instead of desensitising the fearful dog, the trainer had reinforced the fear"
desensitising (Verb) — Cause not to be sensitive. ex. "The war desensitised many soldiers" ex. "The photographic plate was desensitised"
desensitising (Verb) — Make insensitive. ex. "His military training desensitised him"