bathe    (vt) kwūhagira
(esp. legs) kwiyoga
(oneself) kwīyuhagira, kwīyoza, kwōga
En-En dictionary 
kwūhagira (-ūhagiye)   v    to bathe (vt) (originally associated with ceremonial cleansing at time of a death in family)
kwūhagiza (-ūhagije)   v    to bathe with
kwīyuhagira (-īyuhagiye)     v    1. to bathe oneself (formerly a ceremonial cleansing, but now bathing in general), 2. to shower
kwūhagirira (-ūhagiriye)   v    to bathe for, because of
kwūhagirana (-ūhagiranye)   v    to bathe each other
kwīyuhagirira (-īyuhagiriye)     v    to bathe at
kwīyoga (-īyoze)     v    to bathe (esp. the legs)
kwūhagirwa (-ūhagiwe)   v    to be bathed
 bathe found in: Kirundi I (Study lessons)
lesson 42   “To wash”
lesson 55   Negative of Ordinary Past
lesson 68   Negative Imperative and Subjunctive