孔洞

Traditional form:

孔洞

Pinyin (reading):

kǒngdòng

Definitions:

• small hole in an object

Characters:

• 孔 - opening, hole, orifice; great
• 洞 - cave, grotto, hole, ravine

Traditional characters:

• 孔 - opening, hole, orifice; great
• 洞 - cave, grotto, hole, ravine