deny    guhakana, kwīma
(emphatically) guhebūza, kwīhakana
En-En dictionary 
guhakana (-hakanye)   v    1. to say no, to refuse, 2. to deny
question    (to ask) kubaza
(to ~ in sense of examine) gucaca
(to ~ carefully) gucunaguza, gucunaguriza
(to ~ so strongly that one dares not deny again) kujīnjibura
En-En dictionary 
kwīhakana (-īhakanye)     v    to deny
kujīnjibura (-jīnjibuye)     v    1. to question so strongly that one dares not deny again, 2. to prove to one that he's wrong
guhebūza (-hebūje)     v    1. to tell someone that his friend has died, 2. to be perfect, complete, absolutely wonderful, 3. to surpass all others either good or bad, 4. to deny emphatically, 5. to discourage
kwīma (-īmye)     v    1. to deny, to refuse to give, to withhold, 2. to become king, to ascend to the throne, 3. to go to male, to copulate (only of female animals)
 deny found in: Kirundi II (Grammar)
chapter 33   Reflexive used to intensify