Umfula umzila wamanzi ogeleza ngokwemvelo, imvamisa amanzi angenasawoti, ogelezela ngasolwandle, ulwandle, ichibi noma omunye umfula. Kwezinye izimo, umfula ugeleza ungene emhlabathini bese uyoma ekugcineni kwendlela yawo ungafinyeleli kwelinye iqhwa lamanzi. Imifula emincane kungabhekiswa kuyo kusetshenziswa amagama anjengemifudlana, umfula, umfula, umfudlana, nerill. Azikho izincazelo ezisemthethweni zegama elijwayelekile lomfula njengoba lisetshenziswa kuzici zomhlaba, yize kwamanye amazwe noma emiphakathini umfudlana uchazwa ngosayizi wawo. Amagama amaningi emifula emincane aqondene nendawo; izibonelo "run" kwezinye izingxenye ze-United States, "burn" eScotland nasenyakatho-mpumalanga yeNgilandi, futhi "beck" enyakatho yeNgilandi. Kwesinye isikhathi umfula uchazwa njengomkhulu kunomfula, kodwa hhayi njalo: ulimi aluqondakali. Uhlu lwemifula yaseNingizimu Afrika (IsiNgisi) Le-athikhili iyisigcino (isiNgisi: "a stub"). Ungakwazi ukusiza uWikipedia: ngokuyikhulisa.