Something ironclad is either covered in iron for protection or protected in a different way. An ironclad guarantee can’t be broken or taken back.
Clad in iron; protected or covered with iron, as a vessel for naval warfare.
Adjective S.
without flaws or loopholes; "an ironclad contract"; "a watertight alibi"; "a bulletproof argument"
Adjective S.
inflexibly entrenched and unchangeable; "brassbound traditions"; "brassbound party loyalists"; "an ironclad rule"
a.
Clad in iron; protected or covered with iron, as a vessel
for naval warfare.
a.
Rigorous; severe; exacting; as, an ironclad oath or
pledge.
n.
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.
Ironclad
Ironclad
Clad in iron; protected or covered with iron, as a vessel for naval warfare.
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.
Usage Examples
There aren't a lot of ironclad rules of family life, but here's one: No matter how much your parents deny it - and here's betting they deny it a lot - they have a favorite child. And if you're a parent, so do you.
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Other Usage ExamplesThe one ironclad rule is that I have to try. I have to walk into my writing room and pick up my pen every weekday morning.