Maim, disable (7)
I believe the answer is:
cripple
I believe this is a double definition.
'maim' is the first definition.
(I know that cripple is a more specific form of the action maim)
'disable' is the second definition.
(thesaurus)
(Other definitions for cripple that I've seen before include "Sabotage" , "Make lame" , "Incapacitate" , "damage" , "Disable - lame person" .)