gable

Japanese: gable

…In the main nave, rectangular quarter vaults are placed at each bay to unify the column system, and the arches of each vault are connected to small columns, which together form a large composite column that continues to the floor, creating a vertical line of force and a magnificent visual effect. With the tribune removed from the exterior, flying buttresses were used systematically for the first time as a necessary element of balance, with small pinnacles on each buttress and sharp triangular gables on the window arches, harmonizing with the overall upward-lifting effect. This is the basic form of classical Gothic churches, and Chartres is still heavy and well-formed with reins, while Amiens is 42 meters from the floor to the vault, demonstrating perfect structural beauty. …

From [Gable]

… [Masashi Hamashima]
[Western]
Even in the West, where stone and brick architecture is prevalent, the triangular section seen at the top of the gable of a building's main structure is called a gable. In English, it is called a gable. Most gables in Western architecture have walls that slope in the same direction as the roof, but in countries such as Germany and the Netherlands, where roofs are steeply sloped, various developments have been created.

*Some of the terminology that mentions "gable" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…主廊には梁間ごとに長方形の四分ボールトを架して支柱組織を統一し，各ボールトのアーチ群はそれぞれ小円柱に連なり，これが集まって床上までつづく大複合柱を形成し，垂直に力線構成を整え，壮麗な視覚効果を生む。外部にはトリビューンを除いたため，はじめてフライイング･バットレス群が均衡上の必要要素として組織的に適用され，各バットレスに小ピナクルをたて，窓のアーチの上に鋭い三角破風形(ゲーブルgable)をのせ，全体の上昇的効果に協和する。これが古典的ゴシック教会堂の基本形式であって，シャルトルはまだ重厚であり，ランスで整い，アミアンは床上からボールトまで42mに及び，完全な構成美を発揮する。…