Ledge
来自Big Physics
Middle English (denoting a strip of wood or other material fixed across a door, gate, etc.): perhaps from an early form of lay1. ledge (sense 1) dates from the mid 16th century.
wiktionary
From Middle English legge; usually considered to be from Middle English leggen, a variant of leyen(“to put, lay (down, waste to)”).
Shortening of legend.
Shortening of legislature.
etymonline
ledge (n.)
late 13c., "crossbar on a door," perhaps [OED] from the Middle English verb leggen "to place, lay" (see lay (v.), and compare ledger). Others suggest a Scandinavian source cognate with Swedish lagg "the rim of a cask." Sense of "narrow shelf" is first recorded 1550s; that of "shelf-like projection of rock" is from 1550s.
