重大

zhòngdà
  1. great
  2. important
  3. major
  4. significant

CEDICT

Entry Composition

1 重 zhòng
  1. heavy
  2. serious
  3. to attach importance to
2 大 dà
  1. big; large; great
  2. older (than another person)
  3. eldest (as in 大姐 dàjiě)
  4. greatly; freely; fully
  5. (dialect) father
  6. (dialect) uncle (father's brother)