ignorance    ubupfu, ubutūngu, ubuzimire
En-En dictionary 
par ignorance    ignorantly    (to act) kwīfūtānya
En-En dictionary 
ubutūngu     8  class 8
singular: ubu-
  
(no pl.) ignorance
ubupfu     8  class 8
singular: ubu-
  
(no pl.) 1. folly, 2. ignorance
ubuzimire   8  class 8
singular: ubu-
  
(no pl.) ignorance, being lost
 ignorance found in: Kirundi I (Study lessons)
lesson 116   Ki and Umuki
 ignorance found in: Imyibutsa (proverbs)
Umwibutsa 29   Uwutazi umuti awunyako....