Crenel
01
銃眼, 狭間
a notched or indented opening in a battlement or parapet, typically used for observation or defensive purposes
02
銃眼, 城歯
one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.)
to crenel
01
銃眼を備える, 銃眼を供給する
supply with battlements
