铁丝
Meanings
1. iron wire (classifier 根 gen1)
2. subway enthusiast (abbr. for 地铁粉丝 (dìtiěfěnsī))
3. railway enthusiast (abbr. for 铁路粉丝 (tiělùfěnsī))
Characters used
Examples1
他
Having forgotten his key, he was able to open the door by inserting a wire in the keyhole.