ironclad

名词 ironclad:

1. a wooden warship of the 19th century that is plated with iron or steel armor

形容词 ironclad:

1. sheathed in iron plates for protection
2. inflexibly entrenched and unchangeable
   同义词：brassbound

i.ron.clad

adj.（形容词）
Sheathed with iron plates for protection.
包铁片以防护
Rigid; fixed:
不能变的：刻板的；固定不变的：
例句：
an ironclad rule.
铁定的规矩

n.Nautical （名词）【航海】
A 9th-century warship having sides armored with metal plates.
铁甲舰：9世纪两则用金属片作为护甲的战舰