出典:Wiktionary
内陸河川.
inland rivers
川のふち
a river
to cross a river―(泳いでなら)―swim across a river―swim over a river―(徒渉してなら)―wade across a river―ford a river―(渡し舟でなら)―ferry a river―cross a ferry
the banks of a river
one hundred rivers
numerous rivers
川のそこ
「rivers」は名詞「river」の複数形です