warren

今日覚えたい単語もRAISING OBAMAからです。
The city that greeted 25-year-old Ann Soetoro and her six-year-old son was a tapastry of sprawling villages, interwoven with forests, paddy fields and marshland. Narrow alleys disappeared into warrens of tile-roofed houses in the rambling urban hamlets, called kampungs.
"warren" を辞書で見ます。
・Merriam-Webster's Online Dictionary: a: a crowded tenement or district b: a maze of passageways or small rooms: got lost in the warren of interconnected side streets
・Vocabulary.com: an overcrowded residential area
Vocabulary.comの補足を読むと "warren" は兎の地中の巣から来たことが分かります。
When Bugs Bunny outruns Elmer Fudd and vanishes down his rabbit hole, he's escaping into a warren - a network of underground tunnels where rabbits live.
A warren isn't just the maze-like tunnels where rabbits live. You may encounter a warren of subway tunnels or a warren of interconnected bomb shelters. Bring those narrow paths above ground and cluster them with homes and you have another kind of warren, or a maze-like residential area.
なるほど、会社の通勤につかっている東京の地下鉄はまさに世界有数の "a warren of subway tunnels" と言えます。