This is the 7852nd most frequent Polish word.
miedzi
"**Miedzi**" translates to "**copper**" in English.
The word 'miedzi' refers to the material 'copper' and is used in its genitive case to express 'of copper'.
Miedzi używa się do produkcji przewodów elektrycznych.
Copper is used to produce electrical wires.
Here 'miedzi' indicates the material ('copper') from which the bell is made, used in its genitive case.
W zabytkowym kościele zobaczyłem dzwon z miedzi.
In the historic church, I saw a bell made of copper.
'Miedzi' in this sentence refers to the material 'copper' again and is used as a descriptor for the objects made from it, in the genitive case.