Arsenal is Arabic?

بسم الله

I just can't believe that the word Arsenal came from Arabic word. The Arabic word which it originates is  دَارُ الْصِنَاعَة / Darul Sinaa a'h which means "house of industry". I suspect it must has mean some kind of warehouse or storage of some engineering stuff.  Some info from oxford dictionary :-

http://oxforddictionaries.com/definition/english/arsenal

• noun

  • a collection of weapons and military equipment:Britain’s nuclear arsenal
  •  a place where weapons and military equipment are stored or made.
  •  an array of resources available for a certain purpose:we have an arsenal of computers at our disposal

  Origin:

  early 16th century (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'