hy·po·sen·si·tize [ hpō sénssə tz ](past and past participlehy·po·sen·si·tized, present participlehy·po·sen·si·tiz·ing, 3rd person present singularhy·po·sen·si·tiz·es)
transitive verb
Definition:
make somebody less sensitive: to lower somebody's sensitivity to something, e.g. in the treatment of allergies