Same as crenulate.

To furnish with battlements or embrasures; render defensible by adding battlements, as a house.

To cut loopholes through, as a wall.

To add crenelations; render a place defensible by battlements.

transitive verb. To furnish with crenelles.

transitive verb. To indent; to notch.

transitive verb. a kind of indented molding used in Norman buildings.

verb. To furnish with crenelles.

verb. To indent; to notch.

verb. supply with battlements

"With this branch of their work, Captain Tempe was determined that they should be thoroughly acquainted, and they were taught how to use cover of all kinds with advantage; how to defend a building, crenelate a wall, fell trees to form an obstacle across roads, or a breastwork in front of them; and how to throw themselves into square, rapidly, to repel cavalry."

crenelated molding  crenelation  

furnish  provide  render  supply  

ventilate  

indent  notch