to cross a river―(泳いでなら)―swim across a river―(徒歩でなら)―wade (across) a river―ford a river―(馬でなら)―ride across 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 area in the vicinity of a river
川のふち
the banks of a river
川のそこ
the fork of a river
the upper courses of a river―the upper reaches of a river
a strip of land along a river