somambike  n    intimate friend, one who shares his secrets or last food with you
friend    umugēnzi
(close ~) umukūnzi
(intimate ~, the one you share your last hidden food with) somambike
(most intimate ~, ”you die - I die”) pfampfe
(to visit a ~) kubūngirana
En-En dictionary 
intimate    (friend) umukūnzi, somambike, pfampfe
En-En dictionary