無む防ぼう備び都と市し

noun

open city; defenseless city

A city declared undefended during war, often under international law. Used in historical and legal contexts.

• 第だい二に次じ世せ界かい大たい戦せん中ちゅう、パリは無む防ぼう備び都と市しと宣せん言げんされた。

  During World War II, Paris was declared an open city.