Immunology To make (an individual) nonreactive or insensitive to an antigen.
To make emotionally insensitive or unresponsive, as by long exposure or repeated shocks: “This movie in effect may resensitize people who thought they were desensitized to violence” (Steven Spielberg)
To make (a photographic film or substance) less sensitive to light.
derivatives
de·seńsi·ti·zátion
noun
de·seńsi·tiźer
noun
The American Heritage® Dictionary of the English Language, Fourth Edition