关键

Traditional form:

關鍵

Pinyin (reading):

guānjiàn

Definitions:

• crucial point
• crux
• CL:個／个 (gè)
• key
• crucial
• pivotal

Characters:

• 关 - frontier pass; to close, to shut; relation
• 键 - lock, door bolt; key

Traditional characters:

• 關 - frontier pass; to close, to shut; relation
• 鍵 - lock, door bolt; key