noun · a tool with a heavy metal head used for hitting or driving nails

他手里拿着一把沉重的铁锤。

verb · to strike with a hammer or to hammer metal into a specific shape

铁匠把红热的铁块锤成了薄片。

noun · a sliding weight used on a steelyard, balance, or plumb line

在使用杆秤时，需要移动秤锤来平衡。