かわ
river
kawa
JMdict 1390020
そのかわはその川はthat riverひろい広いwide
その (that) points to a specific river, and は (topic) raises 川かわ (river) as the topic — "as for that river…". The i-adjective 広いひろい (wide) works as the whole predicate, so no copula is needed; in plain form it sounds matter-of-fact.
hanamaru