boyau means A small trench or ditch, typically built in a zigzag pattern, serving to connect or provide communication between two trenches, particularly the rear and front lines. Lexicurio rates it Sui generis — a strength score of 89 out of 100.
noun
- A small trench or ditch, typically built in a zigzag pattern, serving to connect or provide communication between two trenches, particularly the rear and front lines.
- A line, drawn winding about, in order to enclose several tracts of land, or to attack some works.