Other forms: drawbridges
A drawbridge is a bridge that lifts to close a castle off. Raise the drawbridge, lower the drawbridge, cross the drawbridge.
It spans the moat and is drawn up against the gate, so the bridge becomes the door. Raise the drawbridge is now used figuratively for shutting yourself off from everybody. Modern lifting bridges over water work on the same idea.
1noundrawbridgeA bridge that lifts to close a castle off.
“The guards raised the drawbridge as the enemy army approached the castle.”
drawbridge is a bridge.
Middle English drawebrigge, from draw plus bridge — a bridge that is drawn up.
Middle English
drawebrigge
English, today
drawbridge
Middle English drawebrigge; by surface analysis, draw + bridge.
Etymology from Wiktionary, CC BY-SA