Mungu   1  class 1
singular: umu-
  
God (from Sw., term introduced by missionaries in contrast to the traditional Kirundi term Imāna)
kuwa Mungu  n    Sunday
God    Imāna, Mungu (Sw.)
(who is all seeing) Indāvyi
(the Creator) Rurema
(the Lord, Eternal One) ūhoraho
En-En dictionary 
Sunday    icūmwēru, umusi w'Imāna, kuw'Imāna, kuwa Mungu (Sw.), kw'iyīnga
En-En dictionary