n.回水；回水河汊；窮鄉(xiāng)僻壤

Some were playing water-polo in the backwater. 有些人在回水河汊玩水球。

There aren't any good shops in this village, it's a real backwater. 在這村莊沒有任何一間好的商店，真的是閉塞落后的地方。

I find this town too much of a backwater. 我覺得這個(gè)城鎮(zhèn)太閉塞。