隧洞

Traditional form:

隧洞

Pinyin (reading):

suìdòng

Definitions:

• tunnel

Characters:

• 隧 - tunnel, underground passage; a path to a tomb
• 洞 - cave, grotto, hole, ravine

Traditional characters:

• 隧 - tunnel, underground passage; a path to a tomb
• 洞 - cave, grotto, hole, ravine