Why this word is great
COUNTERMURE — [Noun] A secondary wall constructed behind another to serve as a replacement if the primary wall is breached or destroyed. From French contremurer, from contre- ("counter-") + murer ("to wall"), ultimately from Latin murus ("wall"). Unlike a "rampart" (a broad, earth-filled embankment) or a "parapet" (a low protective barrier along a roof’s edge), a countermure is a deliberate redundancy, a shadow wall biding its time. It is the mason’s quiet admission of fallibility, the cold stone waiting behind the first line of defense, the unspoken knowledge that all fortresses—like all certainties—will one day fall. And when they do, there must be something left to stand.