はりがね針金harigane
1.
A thin, elongated piece of metal that has been shaped and drawn out, resembling a strand or thread.
2.
A type of metal material often used for binding or constructing, characterized by its flexibility and varying thickness.
3.
Historically, it refers to electrical wiring used during the Meiji era.
Example:
私達は二本の柱の間に針金を張った。