隧
suì
tunnel
underground passage
earthwork (阝) + sound suì (遂) = tunnel through the ground
The left radical 阝 here represents a mound or earthwork, grounding the character in something built into the ground. 遂 primarily contributes the sound suì; together they evoke a passage carved through earth.
遂To accomplishPhonetic
阝A moundSemantic
工人们在山下挖了一条隧道。
gōng rén men zài shān xià wā le yī tiáo suì dào。
The workers dug a tunnel under the mountain.
这条隧道连接两个城市，节省了很多时间。
zhè tiáo suì dào lián jiē liǎng gè chéng shì，jié shěng le hěn duō shí jiān。
This tunnel connects two cities and saves a lot of time.