Seems the writers of The Lion King were awfully fond of Kiswahili...
Pumba/bumba: Swarm (since he's a stinky warthog who's introduced to us with a swarm of flies buzzing around him), or
-pumbavu: Stupid; thoughtless (since he can be a bit of a dimwit)
edit: Rafiki: friend
And, of course:
Hakuna matata: To have no trouble; to be without problems