隧道 (suìdào): tunnel

Measure Word

一条隧道 tiáo

这条隧道有三公里长。

Zhè tiáo suìdào yǒu sān gōnglǐ cháng.

This tunnel is three kilometers long.

火车正在穿过隧道。

Huǒchē zhèngzài chuānguò suìdào.

The train is passing through the tunnel.

memory

隧 (tunnel) + 道 (road/path) = a tunnel road, i.e., a tunnel passage.

隧 suì

道 dào