avenge    guhōra
(wrong done to one's family) kuzira
En-En dictionary 
harm    (because of revenge) kuziza
(in order to avenge) guhōra
(to desire to ~ another without reason) gukānkamwa
(to prevent one from harming another) kuzina
En-En dictionary 
guhōra (-hōye)     v    to avenge, to harm in order to avenge
kuzira (-zize)   v    1. to be forbidden, taboo, to refuse to eat, to despise, 2. to be punished for someone else's wrong doing, to suffer or be punished because of a certain thing, 3. to avenge wrong done to one's family
umuhōzi (aba-)     1  class 1
singular: umu-
plural: aba-
  
avenger
avenger    umuhōzi
En-En dictionary