the.com/flanchard

means A flanchard is a piece of plate armor designed to protect the flank of a warhorse, hanging down on either side of the saddle.

from From Old French 'flanchiere,' built on 'flanc' (the flank, the side of the body) — itself likely of Germanic origin, a cousin of the same root that gives us English 'flank.' The '-ard' ending is the same workmanlike French suffix that names a thing by its job, so a flanchard is simply 'the flank thing,' fitted to a beast that needed its sides guarded as much as a knight needed his.