Definition of "Numb" :

verb: make numb or insensitive

"The shock numbed her senses."

adjective: so frightened as to be unable to move; stunned or paralyzed with terror; petrified

"Too numb with fear to move."

adjective: lacking sensation

"Numb with cold."

adjective: (followed by to') not showing human feeling or sensitivity; unresponsive

"Numb to the cries for mercy."