Answer: desensitize

AnswerCrossword Clue
desensitizeFree (someone) from a phobia or neurosis by gradually exposing the person to the thing that is feared
desensitizeMake less sensitive
desensitizeMake (someone) less likely to feel shock or distress at scenes of cruelty, violence, or suffering by overexposure to such images
desensitizeto make insensitive