A casement is a window that opened by means of hinge at the side. 竖铰链窗种铰链启窗户。
Two of them knelt at her casement, with muskets at their side! 其两跪窗,跟著火枪身!
casement [ noun ] a window sash that is hinged (usually on one side) <noun.artifact>
Casement \Case"ment\, n. [Shortened fr. encasement. See {Incase 1st Case}, and cf. {Incasement}.] (Arch.) A window sash opening on hinges affixed to the upright side of the frame into which it is fitted. (Poetically) A window.