sensitize

verb3

1. •
   To make (someone or something) sensitive or responsive to certain stimuli.

   • Anaphylaxis is the syndrome elicited in a hypersensitive subject upon subsequent exposure to the sensitizing antigen. — 1999
2. •
   To make (someone) increasingly aware of, in a concerned or sensitive way.

   • Ever since the burglary, we've been more sensitized to home security issues.
3. •
   To render capable of being acted on by actinic rays of light.