kwībira (-ībiye)     v    1. to sink, plunge in, 2. to steal at, for
kwībirana (-ībiranye)     v    to plunge in with
plunge    (~ in, vi) gucokera, kwībira
(vt) gucokeza
En-En dictionary 
sink    (to ~) kwībira, kurengerwa, kuroka
(as in water) kudobera
En-En dictionary