通牒

tōngdié
diplomatic note

CEDICT

diplomatic note

Wiktionary

兩國交換意見或由一國通知對方，要求對方答覆的外交文書。

重編國語辭典

Entry Composition

1 通 tōng
  1. to go through
  2. to know well
  3. (suffix) expert
  4. to connect
  5. to communicate
  6. open
  7. to clear
  8. classifier for letters, telegrams, phone calls etc
2 牒 dié
  1. (official) document
  2. dispatch

Containing this entry

最後通牒 zuìhòutōngdié ultimatum