in reality,  really    koko, cane, kuvyukuri, n'ukuri, y'ukuri, c'ukuri etc.
En-En dictionary 
ostensibly    (to be humble or good ~ but not in reality) kwīyorobeka
En-En dictionary 
humble    gucisha bugufi
(to be) kwicisha bugufi, kwīyorosha
(to be ~ ostensibly, but not in reality) kwīyorobeka
En-En dictionary 
kuvyukuri   adv    1. really, in reality, 2. actually
kwīyorobeka (-īyorobetse)     v    1. to be humble or good ostensibly but not in reality, 2. to be a hypocrite
 in reality found in: Kirundi I (Study lessons)
lesson 104   Uses of Nta
 in reality found in: Kirundi II (Grammar)
chapter 43   Unusual Verb Accords