Boot
International Standard Bible Encyclopedia · James Orr and contributors
boot (ce'on; the King James Version battle; the American Standard Revised Version "armor"; the American Revised Version, margin "boot"): The word ce'on, found only in Isa 9:5 (Hebrew 9:4), is probably a loanword from the Assyrian senu, meaning "shoe," "sandal." The root has the same meaning in Aramaic and Ethiopic. The passage should be translated "every boot of the booted warrior."
Source of the article
International Standard Bible Encyclopedia — James Orr, general editor and contributors; CrossWire SWORD module ISBE 2.2
Bible Strong digital edition from CrossWire module 2.2; historical scholarship originally published in 1915