numb in WordNet English dictionary

1. lacking sensation
   "my foot is asleep"; "numb with cold"
   asleep  benumbed  numb 
   
2. (followed by `to') not showing human feeling or sensitivity; unresponsive
   "passersby were dead to our plea for help"; "numb to the cries for mercy"
   dead  numb 
   
3. so frightened as to be unable to move; stunned or paralyzed with terror; petrified
   "too numb with fear to move"
   numb 
   

1. make numb or insensitive
   "The shock numbed her senses"
   numb  benumb  blunt  dull