Where does “ironclad” come from?

Ironclad combines English iron with English clad, where iron derives from Middle English iren, Old English īsen, Proto-Germanic īsarną, Proto-Celtic īsarnom, and Proto-Indo-European roots including gley-, gel-, and h₁ésh₂r̥.

ironclad (English): Covered with iron, steel, or some metal,...

Definitions

  1. Covered with iron, steel, or some metal,...

Ancestry of “ironclad”, step by step

ironclad traces back through two separate lines of ancestry.

via English iron

StepLanguageWordMeaning
1EnglishironA common, inexpensive metal, silvery grey when...
2OssetianиронOssetian person; an Ossetian, speaking the Iron...
3OssetianирOssetians, the Ossetian nation; the speakers of...
4Proto-IranianwiHráhman
5Proto-Indo-IranianwiHrásman
6Proto-Indo-EuropeanwiHrósman; husband; warrior, hero
7Proto-Indo-Europeanweyh₁-to chase, pursue; to suppress, persecute

via English clad

StepLanguageWordMeaning
1EnglishcladWearing clothing or some other covering (for example, an armour) on the body; clothed, dressed
2Middle EnglishclaðAlternative form of cloth
Every word from Proto-Indo-European weyh₁-Every word from Proto-Indo-European wiHrósEvery word from Proto-Indo-Iranian wiHrás