Meaning: こうてつn. (Kanji=更迭) change; shake up; reshuffle, rearrangement; exchanging placesn. (Kanji=甲鉄) armor, armor plate, body protectionn. (Kanji=鋼鉄) steel, hard and strong metal alloy made up of iron and carbon (used for making knives, machines, etc.)v. (Kanji=更迭する) change; shake up; reshuffle, rearrange