ubuhuku     8  class 8
singular: ubu-
  
(no pl.) cave, den (of wild animals, as in rocks)
cave    isenga, ubuhūku
(of wild animals) ubuvumo
En-En dictionary 
den    (of wild animals) ubuhūku, ubuvumo
En-En dictionary 
 ubuhuku found in: Imigani (tales)
Umugani 48   Inyanana n'ifuku n'umusakanyika