suffer   ▶ kubabara, gucumukura
 (because of certain thing) kuzira
 (much) gusinzikara
 (pain without complaint) kwīyumānganya
 (to cause to) kubabaza, gusinzikaza
En-En dictionary 
kuzira (-zize)   v   ▶ 1. to be forbidden, taboo, to refuse to eat, to despise, 2. to be punished for someone else's wrong doing, to suffer or be punished because of a certain thing, 3. to avenge wrong done to one's family
gusinzikara (-sinzikaye)     v   ▶ to suffer much
gusinzikaza (-sinzikaje)     v   ▶ to cause to suffer
gusinzikazwa (-sinzikajwe)     v   ▶ to be made to suffer by
kwīyumānganya (-īyumānganije)     v   ▶ 1. to be reserved, 2. be unwilling to commit oneself, 3. suffer pain without complaint, be stoical, 4. to go or do reluctantly
kubabaza (-babaje)     v   ▶ 1. tu hurt, injure (vt), cause to suffer (from kubabara), 2. to bother
kubabazwa (-babazwe)     v   ▶ te be caused to suffer
pain   ▶ igisigo, umubabaro, ububabare
 (sharp) umusōnga
 (to get relief from) kwōroherwa
 (to grit one's teeth to avoid showing) gushinyanga, gushinyiriza
 (to have) kubabara
 (to have severe) kurībwa
 (to suffer) gucumukura
(to suffer without complaint) kwīyumānganya
 (to take pains with) kwītōndera
En-En dictionary 
gucumukura (-cumukuye)     v   ▶ 1. to suffer, to have pain, 2. to fail, 3. to be in distress, 4. to work hard
ibara (ama-)     5  class 5
singular: i-,iri-
plural: ama- ▶ 1. spot, 2. woe, 3. suffering, 4. dishonor
kubabara (-babaye)     v   ▶ 1. to suffer, hurt, 2. to be sad (vi), 3. to care about, 4. to feel, experience (negative emotion)
kwībabaza (-ībabaje)     v   ▶ to cause oneself to suffer, to agonize
ububabare   8  class 8
singular: ubu- ▶ pain, suffering (from kubabara)
suffering   ▶ umubabaro, ibara
En-En dictionary 
 suffer found in: Kirundi I (Study lessons)
lesson 79  ▶ Causative Verbs II
 suffer found in: Kirundi II (Grammar)
chapter 3  ▶ Conditional Sentences – “if”