boyau /bwoˈyō, bwäˈyō or boiˈō/ (fortification)

A communication trench

• lucky dips
• lucky-piece
• lucky-pieces
• lucky stone
• lucky stones
• lucky strike
• lucky strikes
• lucrative
• lucratively
• lucrativeness
• lucre
• lucres
• luctation
• luctations
• lucubrate
• lucubrated
• lucubrates
• lucubrating
• lucubration
• lucubrations
• lucubrator
• lucubrators
• luculent
• luculently
• Lucullan