verb · to heat ore in order to extract metal or to purify metal

古代工匠就在这里采矿炼金。

verb · variant of 链 liàn, chain

他在腰上系了一根粗粗的铁炼。

verb · to purify or process substances such as oil, chemicals, or sugar through heating

传说他在深山中隐居，开炉炼丹。