Explanation:
deprive (someone) of the right to vote.
"the law disenfranchised some 3,000 voters on the basis of a residence qualification"
deprive (someone) of a right or privilege.
"we strongly oppose any measure which would disenfranchise people from access to legal advice"
ARCHAIC
deprive (someone) of the rights and privileges of a free inhabitant of a borough, city, or country.
It allows him to hear the war drum that forces him to kill. The acute silence makes the narrator so uncomfortable, he must make the old man scream. The narrator thinks that only killing the old man will make all of the surrounding noises disappear