a collection of weapons such as guns and explosives （统称）武器 The treaty requires them to reduce their nuclear arsenal by 30%. 条约要求他们把核武器的数量减少30%。 The cost of the proposed military arsenal is huge. 拟议中的军事武库的成本是巨大的。
a building where military weapons and explosives are made or stored 兵工厂；武器库；军火库 The building was used as an arsenal until the eighteenth century. 这个建筑18世纪以前一直用作军火库。 A group of soldiers unsuccessfully attacked an arsenal close to the airport. 一群士兵袭击了机场附近的一个军火库，但没有成功。
Word Originearly 16th cent. (denoting a dock for the construction and repair of ships): from French, or from obsolete Italian arzanale, based on Arabic dār-aṣ-ṣinā‘a, from dār ‘house’ + al- ‘(of) the’ + sinā‘a ‘art, industry’.