Of or relating to or happening in a river.

Roget 348: fluent; diffluent^†, profluent^†, affluent; tidal; flowing etc. v.; meandering, meandry^†, meandrous^†; fluvial, fluviatile; streamy^†, showery, rainy, pluvial, stillicidous^†; stillatitious^†.    ... show more

Dutch: fluviatiel
Polish: rzeczny, fluwialny