To make insensitive or less sensitive and painful.
Immunology to create (someone) nonreactive or insensitive to an antigen.
In Order To Make emotionally insensitive or unresponsive, as by long exposure or repeated bumps: "This movie in effect may resensitize individuals who thought these were desensitized to physical violence” ( Steven Spielberg).
to produce (a photographic film or material) less sensitive to light.
to rendered insensitive or less painful and sensitive. Opposite of sensitize.