死穴

Traditional form:

死穴

Pinyin (reading):

sǐxué

Definitions:

• lethal point (acupuncture)
• vulnerable spot
• Achilles' heel

Characters:

• 死 - dead; death; impassable, inflexible
• 穴 - cave, den, hole

Traditional characters:

• 死 - dead; death; impassable, inflexible
• 穴 - cave, den, hole