What is "chiengi"

Chiengi or Chienge was a historic colonial boma of the British Empire in central Africa and today is a settlement in the Luapula Province of Zambia, and headquarters of Chiengi District. Chiengi is in the north-east corner of Lake Mweru, and at the foot of wooded hills dividing that lake from Lake Mweru Wantipa, and overlooking a dambo (marshy plain) stretching northwards from the lake, where the Chiengi rivulet (the origin of the name) flows down from the hills.