adj .
insensitive ; emotionally hardened 무감각한 ; 감정이 무딘

• The _____ biology teacher gave a B to the whining student, even though he swore that such a low grade would keep him out of medical school.
• Living in New York for ten years has made Sally so _____ that to reach her mailbox she steps on the back of the homeless person who sleeps in the lobby of her apartment building
• A callus is a patch of thickened or roughened skin. A _____ person is someone who has a metaphorical callus covering his or her emotions.