Radical:

meaning for tóng:

  • - copper (chemistry)
  • - see also 红铜 bronze medal
  • - bronze plaque bearing a business name or logo etc
  • - Classifiers: 枚 bronze (alloy of copper 铜 and tin 锡 )bronze statue
  • - Classifiers: 座 copper coin
  • - copper plate (e.g. for printing)bronze implement
  • - refers to ancient bronze artifacts, from c. 2,000 BC

tiě
tóng
gèng
yìyú易于
jiāozhù浇铸

Iron casts better than copper.