noun
Architectural term for a projecting support built against a wall to strengthen it.
ゴシック建築では、高い壁を支えるために控え壁がよく使われる。
In Gothic architecture, buttresses are often used to support tall walls.
Loanword from English 'buttress', used in similar architectural contexts but more common in modern or Western-style building descriptions.
Compound of 控え (ひかえ, 'support, reserve') and 壁 (かべ, 'wall'). The exact historical derivation is uncertain, but the term literally describes a wall that provides support.