C2 noun /ˈwɒrən/
warren
ウサギの巣穴のネットワーク
Meaning
A network of interconnected rabbit burrows; also used metaphorically for a densely populated building or district.
Example
The old part of the city is a warren of narrow streets.
街の古い部分は、狭い通りが入り組んだ迷路のようです。