天堑

Traditional form:

天塹

Pinyin (reading):

tiānqiàn

Definitions:

• natural moat

Characters:

• 天 - sky, heaven; god, celestial
• 堑 - moat, pit, trench; cavity

Traditional characters:

• 天 - sky, heaven; god, celestial
• 塹 - moat, pit, trench; cavity