rzeka

A large and often winding stream which drains a land mass, carrying water down from higher areas to a lower point, oftentimes ending in another body of water, such as an ocean or in an inland sea.

How to use

The feminine noun 'rzeka' (river) declines regularly. In the locative, it has the form 'w rzece' (in the river). The related adjective is 'rzeczny' (e.g., 'port rzeczny' — river port).