空洞

Traditional form:

空洞

Pinyin (reading):

kōngdòng

Definitions:

• cavity
• empty
• vacuous

Characters:

• 空 - hollow, empty, deserted, bare
• 洞 - cave, grotto, hole, ravine

Traditional characters:

• 空 - hollow, empty, deserted, bare
• 洞 - cave, grotto, hole, ravine