严密 Traditional form: 嚴密 Pinyin (reading): yánmì Definitions: tight; strict; closely controlled; rigorous and thorough 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