The term 'make insensitive to' can be summarized by the crossword solution 'DEADEN, ' which is a six-letter word. DEADEN means to make something less sensitive or less responsive, usually through dulling or numbing. This term is often used in reference to emotions, senses, or reactions. For example, one might DEADEN their sense of taste by eating too much sugar or DEADEN their emotions by numbing themselves to the pain of a traumatic experience.