numb
1. [ adjective ] lacking sensation
Synonyms: benumbed asleep
Examples:

"my foot is asleep" "numb with cold"

Related terms: insensible
2. [ adjective ] so frightened as to be unable to move; stunned or paralyzed with terror
Synonyms: petrified
Examples:

"petrified with fear" "she was petrified by the eerie sound" "too numb with fear to move"

Related terms: afraid
3. [ adjective ] (followed by `to') not showing human feeling or sensitivity; unresponsive
Synonyms: dead
Examples:

"passersby were dead to our plea for help" "numb to the cries for mercy"

Related terms: insensitive
4. [ verb ] make numb or insensitive
Synonyms: blunt dull benumb
Examples:

"The shock numbed her senses"

Related terms: desensitize desensitize