1500-10; (< Middle French) < Italianarzanale < Upper Italian (Venetian) arzanà dockyard < Arabicdār ṣināʿah workshop (literally, house of handwork); initial d probably taken as a form of the preposition di from
c.150o, "dockyard," from It. arzenale, from Arabic dar as-sina'ah "workshop," lit. "house of manufacture," from dar "house" + sina'ah "art, craft, skill," from sana'a "he made." Applied by the Venetians to a large wharf in their city, which was the earliest meaning in Eng. Sense of "public place for making or storing weapons and ammunition" is from 1570s. The London football club (1886) was named for the Royal Arsenal, Woolwich, where the original players worked.