BOYAU
Etymology
Noun
boyau (plural boyaus)
(military) 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.
Anagrams
• Ayoub, Yoabu, bayou
Source: Wiktionary
Boy"au, n.; pl. Boyaux or Boyaus. Etym: [F. boyau gut, a long and
narrow place, and (of trenches) a branch. See Bowel.] (Fort.)
Definition: A winding or zigzag trench forming a path or communication from
one siegework to another, to a magazine, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition