Mother spent the whole morning simmering a pot of soup.
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Rare in modern Chinese, surviving mostly in the regional word 鏊子 (a flat baking pan). It is the metal radical 金 under phonetic 敖, the same sound element seen in 熬 and 螯.
The metal radical at the base marks this as a forged iron implement, grouping it with other metalware like 锅 and 针. It supplies the meaning, not the sound.