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potash[potash 词源字典]

potash: [17] Potassium carbonate was originally obtained by burning wood or other vegetable matter, soaking the ashes in water, and evaporating the resulting liquid in iron pots. The resulting substance was hence called in early modern Dutch potasschen, literally ‘pot ashes’, and the word was adopted into English as potash. From it, or its French relative potasse, the chemist Sir Humphry Davy coined in 1807 the term potassium for the metallic element which occurs in potash.
=> ash, pot, potassium[potash etymology, potash origin, 英语词源]