desensitize
verb [ T ] (UK usually desensitise) uk/ˌdiːˈsen.sɪ.taɪz/ us/ˌdiːˈsen.sə.taɪz/
使迟钝，使麻木
to cause someone to experience something, usually an emotion or a pain, less strongly than before
Seeing too much violence on television can desensitize people to it. 电视上过多的暴力场面会使人对此变得麻木起来。