空心墙

Traditional form:

空心牆

Pinyin (reading):

kōngxīnqiáng

Definitions:

• cavity wall
• hollow wall

Characters:

• 空 - hollow, empty, deserted, bare
• 心 - heart; mind; soul
• 墙 - wall

Traditional characters:

• 空 - hollow, empty, deserted, bare
• 心 - heart; mind; soul
• 牆 - wall