replace    gusigarira
En-En dictionary 
gusigarira (-sigariye)     v    1. to remain in the place of, 2. to replace
ifuro (ama-)     5  class 5
singular: i-,iri-
plural: ama-
  
1. froth, foam, 2. stove, oven, 3. fireplace
kubīmba ifuro to froth at the mouth
inshūmbūshanyo (in-)     3  class 3
singular: i-,in-
plural: i-,in-
  
compensation, that which replaces what one has lost
ishiga (ama-  5  class 5
singular: i-,iri-
plural: ama-
  
(usually used in pl., amashiga) three stones of traditional fireplace
izīko (ama-  5  class 5
singular: i-,iri-
plural: ama-
  
1. traditional fireplace, consisting of three stones (see amashiga), 2. stove, cooker
fireplace    izīko (three stones placed for ~ , see amashiga), ifuro
En-En dictionary 
stone    ibuye
(big) igitāndara, urutāndara
(grinding) urusyo
(rolling) urunāna
(sharpening) irtyāzo
(small, round) akabuyēnge
(three, placed for fireplace) amashiga, izīko
En-En dictionary 
 replace found in: Kirundi I (Study lessons)
lesson 104   Uses of Nta