silence    agacerere
(to ~) gucereza, kuzibiza, guhoza, kuzibiranya
(by motion of the hand) kumama
(one's opponent by speaking the truth) kujegeza
En-En dictionary 
agacerere     7  class 7
singular: aka-,aga-
  
(no pl.) silence
gucereza (-cereje)     v    1. to be silent, 2. to silence
kujegeza (-jegeje)     v    1. to silence one's opponent by speaking the truth, 2. to astound, astonish, 3. to roll about (vt), 4. throw down, 5. to surprise
guhorereza (-horereje)     v    1. to appease, calm, 2. to silence
kumama (-mamye)     v    to silence by motion of the hand
kuzibiranya (-zibiranije)   v    to silence, to fall heavily (rain)
kuzibiza (-zibije)   v    to silence, to stop up