cast iron

¹ American  

noun

1. an alloy of iron, carbon, and other elements, cast as a soft and strong, or as a hard and brittle, iron, depending on the mixture and methods of molding.

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cast-iron ² American  

[kast-ahy-ern, kahst-] / ˈkæstˈaɪ ərn, ˈkɑst- /

adjective

1. made of cast iron.

2. not subject to change or exception.

   a cast-iron rule.

3. hardy.

   a cast-iron stomach.

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cast iron British  

noun

1. iron containing so much carbon (1.7 to 4.5 per cent) that it cannot be wrought and must be cast into shape

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adjective

1. made of cast iron

2. rigid, strong, or unyielding

   a cast-iron decision

Etymology

Origin of cast iron¹

1655–65; cast (past participle of cast ( def. ) ) + iron

Origin of cast-iron²

First recorded in 1655–65

Example Sentences

The snake and cast iron plant can also tolerate darker areas in your home.

From BBC

You’re not going home, anyway, you’re staying up all night at the facility wondering why your quarterback throws the ball like a cast iron pan.

From The Wall Street Journal

Made In 7-piece Enameled Cast Iron Set -Enameled cast iron is a meaningful upgrade for any home cook ready to level up.

From Salon

“I started off with just changing out all my cookware to cast iron, changing out my workout clothes, because all of the polyester stuff has PFAS,” she said.

From The Wall Street Journal

He called on Lammy to give his "cast iron assurance" that Kebatu will be deported from the country by the end of the week.

From BBC