icumi     adj    ten, ten times
thirteen    icumi na batatu
En-En dictionary 
December    ukwēzi kw'icumi na kabiri, Kigarama
En-En dictionary 
November    ukwēzi kwa cumi na rimwe (or, kw'icumi na rimwe) Munyonyo
En-En dictionary 
October    ukwēzi kwa cumi (or, kw'icumi), Gitugutu
En-En dictionary 
ten    icumi, cumi
(~ times) icumi
(things over and above ten) igisaga
En-En dictionary 
eleven    icumi n'umwe
En-En dictionary 
twelve    icumi na babiri
En-En dictionary 
nineteen    icumi n'icēnda
En-En dictionary 
seventeen    icumi n'indwi
En-En dictionary 
 icumi found in: Kirundi I (Study lessons)
lesson 38   Higher Numbers
lesson 39   –ngahe (How many?)
 icumi found in: Kirundi II (Grammar)
chapter 67   Ordinal Numerals with ubwa, or –gira: kubiri, etc.