Jisho

×
じゅうがん 銃眼
Links
Noun
1. loophole; crenel; gun port; porthole​
Wikipedia definition
2. Embrasure​In military architecture, an embrasure is the opening in a crenellation or battlement between the two raised solid portions or merlons, sometimes called a crenel or crenelle. In domestic architecture this refers to the outward splay of a window or arrow slit on the inside. A loophole, arrow loop or arrow slit passes through a solid wall and was originally for use by archers. The purpose of embrasures is to allow weapons to be fired out from the fortification while the firer remains under cover.
Read “Embrasure” on English Wikipedia
Read “銃眼” on Japanese Wikipedia
Read “Embrasure” on DBpedia

Discussions

to talk about this word.