铁丝

tiě sī

iron wire

CL:根[gen1]; subway enthusiast (abbr. for 地鐵粉絲|地铁粉丝[di4 tie3 fen3 si1]); railway enthusiast (abbr. for 鐵路粉絲|铁路粉丝[tie3 lu4 fen3 si1])

铁

tiě

iron (metal)

丝

sī

silk