lump of iron; iron mass; iron ingot
Refers to a solid piece or mass of iron, often unworked or raw. Can be used literally or figuratively to describe something very hard or heavy.
A large lump of iron was placed in front of the factory.
This machine is as heavy as a lump of iron.
Standard kanji spelling for 'iron mass/lump'.
Common mixed spelling; かたまり is often written in kana.
Compound of 鉄 (てつ, 'iron') + の (possessive particle) + 固まり (かたまり, 'lump, mass'). The reading てつ is the on'yomi of 鉄, and かたまり is the nominalized form of the verb 固まる (かたまる, 'to harden, solidify').