DRAWBRIDGE
drawbridge, lift bridge
(noun) a bridge that can be raised to block passage or to allow boats or ships to pass beneath it
Source: WordNet® 3.1
Etymology
Noun
drawbridge (plural drawbridges)
A hinged bridge which can be raised (to prevent its being crossed, as across a moat, or to allow watercraft to travel beneath it).
Synonyms
• (bridge that allows watercraft to travel): bascule bridge
Hypernyms
• movable bridge
Anagrams
• bridge-ward
Source: Wiktionary
Draw"bridge`, n.
Definition: A bridge of which either the whole or a part is made to be
raised up, let down, or drawn or turned aside, to admit or hinder
communication at pleasure, as before the gate of a town or castle, or
over a navigable river or canal.
Note: The movable portion, or draw, is called, specifically, a
bascule, balance, or lifting bridge, a turning, swivel, or swing
bridge, or a rolling bridge, according as it turns on a hinge
vertically, or on a pivot horizontally, or is pushed on rollers.
Source: Webster’s Unabridged Dictionary 1913 Edition