软流层

• 車(vehicle; carriage)RADICAL
• 欠(lacking; yawning)PHONETIC

A vehicle lacking rigidity becomes flexible.

• 氵(water)RADICAL
• 㐬(swirling flow; whirlpool)PHONETIC

Water flowing in a whirlpool becomes a stream, which is the circulation of water.

• 尸(corpse; roof (covering))RADICAL
• 云(cloud)PHONETIC

Layers of houses stacked on top of each other like tiered clouds beneath a roof.