严密

Traditional form:

嚴密

Pinyin (reading):

yánmì

Definitions:

• strict
• tight (organization, surveillance etc)

Characters:

• 严 - strict, rigorous, rigid; stern
• 密 - secret, confidential; intimate, close; dense, thick

Traditional characters:

• 嚴 - strict, rigorous, rigid; stern
• 密 - secret, confidential; intimate, close; dense, thick