通婚

tōnghūn
to intermarry

CEDICT

to intermarry; to become related by marriage

Wiktionary

兩家結成婚姻關係。

重編國語辭典

互通婚姻

維基詞典

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 婚 hūn
  1. to marry
  2. marriage
  3. wedding
  4. to take a wife