The Mandākinī river, which translates as “the slow-flowing” river, is the name of a specific tributary of the Ganges that flows through the Kedāranātha valley in the Himālayas, as well as a name that might be used for other rivers (Monier-Williams 788.2). The term is assumed to refer to a lake in this case (and not a river) because the Tibetan uses the term mtsho.