uncompassionate       
adjective  disapproving uk/ˌʌn.kəmˈpæʃ.ən.ət/ us/ˌʌn.kəmˈpæʃ.ən.ət/
 没有同情心的
not showing sympathy and sadness for the suffering or bad luck of others
  I believe that our society treats its aged in a callous, uncompassionate way.  我认为我们的社会对老年人冷酷无情,毫无同情心。 
 - More examples
 - He said that he had always rejected the idea that we should be uncompassionate because nature is.
 - There is nothing remotely greedy or uncompassionate in wanting to pay less tax, he insists.
 - Lord Carey condemned the Church for being "uncompassionate and uncaring" in this matter.
 - She feels that their opposition to stem-cell research is as uncompassionate as it is unscientific.