noun
lump of iron; iron ingot
Refers to a solid mass of iron, either raw or processed. Can be used in industrial contexts or metaphorically for something heavy and unyielding.
工場で大きな鉄塊を運んでいる。
They are carrying a large iron ingot in the factory.
彼の拳はまるで鉄塊のように固かった。
His fist was as hard as a lump of iron.