Numbs

verb

1. To cause to become numb (physically or emotionally).

   "The dentist gave me novocaine to numb my tooth before drilling, thank goodness."

2. To cause (a feeling) to be less intense.

   "He turned to alcohol to numb his pain."

3. To cause (the mind, faculties, etc.) to be less acute.
4. To become numb (especially physically).