kwīmbirira (-īmbiriye)     v    to plan secretly to do something
secretly    urwīhisho, impisho, inēnge
(to plan to do something ~) kwīmbirira
En-En dictionary 
plan    (to) gutegūra, guteganya
(to ~ for) gutūmbēra, kugira imigabo
(secretly to do something) kwimbirira
(to be obliged to adopt the less desirable of two plans) gutēgekanishwa
(to have several plans of what to do) gutēgekanya
En-En dictionary