like: Kupfer → →
das Kupfer ☊ 
đồng đỏ ☊ 
☊ Kupfer ☊ 铜 ☊ tóng a copper/diamond mine ☊ mine ☊
the physical properties (= the colour, weight, shape, etc.) of copper ☊ physical ☊
Copper pipe is sold in lengths. ☊ pipe ☊
What is the chemical symbol for copper? ☊ symbol ☊
a coil of copper wire ☊ wire ☊
He wore a copper bracelet on his wrist. ☊ wrist ☊