ironclads is a form of:

Ironclad



adjective
1.
(covered or protected with plates) ដែលពាសដែក, ប្រព្រឹត្តិល្មើសបាន, ដោយដែកក្រោះ
2.
(FIGURATIVE) ដែលអាចទប់រឺការពារបាន
ENGLISH MEANING
noun
1.
A naval vessel having the parts above water covered and protected by iron or steel usually in large plates closely joined and made sufficiently thick and strong to resist heavy shot.
adjective
1.
Clad in iron; protected or covered with iron, as a vessel for naval warfare.
2.
Rigorous; severe; exacting; as, an ironclad oath or pledge.