portcullis -
gate consisting of an iron or wooden grating that hangs in the entry to a castle or fortified town; can be lowered to prevent passage
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Wiktionary
Substantiv
portcullis -
A gate in the form of a grating which is lowered into place at the entrance to a castle, fort, etc.
Verb
portcullis -
To obstruct with, or as with, a portcullis; to shut; to bar.
Wikipedia
A portcullis (from the French "porte coulissante" or gliding door) is a latticed grille or gate made of wood, metal or a combination of the two. Portcullises fortified the entrances to many medieval castles, acting as a last line of defence during time of attack or siege. Each portcullis was mounted in vertical grooves in castle walls and could be raised or lowered quickly by means of chains or ropes attached to an internal winch.
