There are several synonyms for the phrase "makes less sensitive." Some of these synonyms include numbs, deadens, desensitizes, blunts, dulls, and reduces sensitivity. Each of these words implies a decrease in sensitivity, whether physical or emotional. For example, numbing a wound with ice reduces the sensitivity of the nerves in the area, while desensitizing oneself to a particular emotion may involve exposure therapy or cognitive behavioral strategies. Blunting emotions or dulling sensations may be useful in certain situations, such as during medical or dental procedures, but can also have negative consequences if overused or abused. Overall, there are many alternatives to the phrase "makes less sensitive," each with their own nuances and implications.