空气调节

• 穴(row; gap)RADICAL
• 工(craftsman; work)PHONETIC

An empty cave with nothing inside is just hollow space.

• 气(vapor; gas; steam)ASSOCIATIVE

The character depicts wisps of vapor rising upward, symbolizing invisible atmospheric air.

• 言(words; speech)RADICAL
• 周(everywhere; thorough)PHONO-SEMANTIC

Using words to divide work and assign tasks everywhere is coordination.

• ⺮(bamboo)RADICAL
• 即(immediately; at once)PHONETIC

Burning bamboo segments reveals the joints that connect each section of the bamboo stalk.