ironclad meaning in Hindi

Examples

1. pretty ironclad, doesn't it?
   काफ़ी पक्का है, है ना?

Meaning

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

1. inflexibly entrenched and unchangeable; "brassbound traditions"; "brassbound party loyalists"; "an ironclad rule"
   synonyms：
2. sheathed in iron plates for protection