nk'ūko     as, like (introducing clause)
as    ku, uko, ingene, ubugene
(introducing clauses) nk'uko
En-En dictionary 
like    bēne, nka
(conj.) nk'uko
(like that) -rtyo
(like this) -rtya
(to be like) gusa
(to look like) gushusha
(to like) gukūnda
(for a short time) guharara
(to try to make someone ~ what he has refused) kwōrekēra
En-En dictionary 
 nk'uko found in: Imigani (tales)
Umugani 15   Icatumye nza mw'ishuri
Umugani 26   Imirango bo n'amajoro