Wiktionary
desensitised
vb. (en-past of: desensitise)
WordNet
desensitised
adj. rendered emotionally insensitive; "a desensitized public indifferent to the violence in films" [syn: desensitized]
made less sensitive; "desensitized to the allergen"; "desensitized photographic film is less sensitive to light" [syn: desensitized]