problem    ingorane, ikibazo
(no problem) ntakibazo
En-En dictionary 
nta ngorane   phr    no problem
ntakibazo   phr    no problem (from ikibazo)
ntaco   phr    1. I don't mind, 2. never mind, 3. no problem
ikibazo (ibi-)     4  class 4
singular: iki-,ic-
plural: ibi-,ivy-
  
1. question, 2. problem, challenge, 3. issue, matter, 4. test, exam
indwāra y'umutima   phr    heart problems
ingorane (in-  3  class 3
singular: i-,in-
plural: i-,in-
  
1. problem, difficulty, 2. trouble, hassle, 3. concern