boyau /bwoˈyō, bwäˈyō or boiˈō/ (fortification)

A communication trench

• loo
• loobier
• loobies
• loobiest
• loobily
• looby
• looed
• loof
• loofa
• loofah
• loofahs
• loofful
• looffuls
• loofs
• looing
• look
• look after
• look a gift horse in the mouth
• lookalike
• lookalikes
• look alive
• look and say
• look-and-say
• look as if butter wouldn't melt in one's mouth
• look askance