dare    kurīndūka, gutīnyūka, kwūbahuka
En-En dictionary 
kurīndūka (-rīndūtse)     v    to be fearless, to dare
gutīnyūka (-tīnyūtse)     v    to dare, be fearless
kujīnjibura (-jīnjibuye)     v    1. to question so strongly that one dares not deny again, 2. to prove to one that he's wrong
kwūbahuka (-ūbahutse)   v    1. to lack respect, be disrespectful, 2. to be insolent, 3. to dare, to be bold, 4. to speak fearlessly
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