adjective Date: 1692 made of cast iron, resembling cast iron: as, capable of withstanding great strain , not admitting change, adaptation, or exception ; rigid
CAST-IRON
Meaning of CAST-IRON in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012