嚴密

严密
yánmì
tight; strict; closely controlled; rigorous and thorough

CEDICT

Entry Composition

1 嚴 yán
  1. tight (closely sealed)
  2. stern
  3. strict
  4. rigorous
  5. severe
  6. father
2 密 mì
  1. dense; close; thick
  2. intimate; close
  3. (bound form) secret; confidential
  4. (Internet slang) to send a private message to (sb); to DM