sentences:  At the time of independence, the country was named the Republic of Congo-Léopoldville to distinguish it from its neighbour the Republic of the Congo-Brazzaville.With the promulgation of the Luluabourg Constitution on 1 August 1964, the country became the DRC, but was renamed to Zaire (a past name for the Congo River) on 27 October 1971 by President Mobutu Sese Seko as part of his "Authenticité" initiative.The word "Zaire" is from a Portuguese adaptation of a Kikongo word "nzere" ("river"), a truncation of "nzadi o nzere" ("river swallowing rivers").