1. A governmental establishment for the storing, development, manufacturing, testing, or repairing of arms, ammunition, and other war materiel.
2. A stock of weapons.
3. A store or supply: an arsenal of retorts.
[Italian arsenale, from obsolete arzanale, darsena, from Arabic aṣ-ṣinā'a, manufacture, industry, and dār aṣ-ṣinā'a, place of manufacture : dār, house (from dāra, to turn, revolve; see dwr in the Appendix of Semitic roots) + al-, the + ṣinā'a, manufacture (from ṣana'a, to make; see ṣnʿ in the Appendix of Semitic roots).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.