Wiktionary
resensitize
vb. To sensitize again (especially following desensitization)
Usage examples of "resensitize".
As he scoured pots, he likewise and unintentionally scoured his conscience, scoured the calluses from it so that he was resensitized to humanity.
Suddenly resensitized, she had seen as if for the first time the beauty of a ewer of cut glass.