Is there a term for the phenomenon of people becoming desensitized to people's suffering, or used to dealing with it without becoming emotionally entangled or upset, in the way that, say, doctors or policemen or even firemen do? I am sure I have heard someone say something like
"When you see this type of pain and suffering every day you become "<___________>".
I don't mean detached or dissonant, and I can't find what I'm looking for in the standard thesauruses (thesauri ?). Please help, it's bugging me that I can't remember it.