关紧

Traditional form:

關緊

Pinyin (reading):

guānjǐn

Definitions:

• to close firmly
• to fasten securely
• to make fast
• to lock

Characters:

• 关 - frontier pass; to close, to shut; relation
• 紧 - tense, tight, taut; firm, secure

Traditional characters:

• 關 - frontier pass; to close, to shut; relation
• 緊 - tense, tight, taut; firm, secure