week    uruhusha, icūmwēru, iyīnga, indwi
(last week) indwi iheze
(next week) indwi iza
En-En dictionary 
indwi iheze   phr    last week
icūmwēru (ivy-  4  class 4
singular: iki-,ic-
plural: ibi-,ivy-
  
1. Sunday, 2. week (Rw)
indwi     1. seven, seven times, 2. week
indwi iza   next week
following    (the ~) ibikwirikira
(beside) iruhānde, hambavu
(~ day) bukēye
(~ week) indwi iza
En-En dictionary 
uruhusha (impusha)     6  class 6
singular: uru-
plural: in-
  
1. permission, 2. rest, 3. vacation, 4. week
iyīnga (ama-  5  class 5
singular: i-,iri-
plural: ama-
  
week, Sunday
 week found in: Kirundi I (Study lessons)
lesson 62   Months, Days of the Week, Telling Time
lesson 70   Review 61 - 69
 week found in: Kirundi II (Grammar)
chapter 2   Compound Future Tenses, Compound Conditional