guǐ dào jiāo tōng
metro
rapid transit; subway
轨
guǐ
(bound form) rail; track; course; path
道
dào
road; path (CL:條|条[tiao2],股[gu3])
交
jiāo
to hand over; to deliver; to pay (money); to turn over
通
tōng
to go through
