名詞 ironclad:

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

形容詞 ironclad:

1. sheathed in iron plates for protection
2. inflexibly entrenched and unchangeable
   同義詞：brassbound

i.ron.clad

adj.（形容詞）
Sheathed with iron plates for protection.
包鐵片以防護(hù)
Rigid; fixed:
不能變的：刻板的；固定不變的：
例句：
an ironclad rule.
鐵定的規(guī)矩

n.Nautical （名詞）【航?！?/i>
A 9th-century warship having sides armored with metal plates.
鐵甲艦：9世紀(jì)兩則用金屬片作為護(hù)甲的戰(zhàn)艦