Definitions of sensitize:

• verb:   cause to sense; make sensitive

  Example: "She sensitized me with respect to gender differences in this traditional male-dominated society"

• verb:   make sensitive or aware

  Example: "He was not sensitized to her emotional needs"

• verb:   make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion

  Example: "Sensitize the photographic film"

• verb:   make sensitive to a drug or allergen

  Example: "Long-term exposure to this medicine may sensitize you to the allergen"