How to pronounce ironclad:
Example: "Brassbound traditions"
Example: "An ironclad contract"
Covered with iron, steel, or some metal, armor-plated.
Solid or certain; not able to be disputed or questioned; irrefutable.
Example: "The suspect had an ironclad alibi for his whereabouts on the night of the crime."
Rigorous; severe; exacting.
Example: "An ironclad oath or pledge"