急剧

急劇
jíjù
rapid; sudden

CEDICT

Entry Composition

1 急 jí
  1. urgent
  2. pressing
  3. rapid
  4. hurried
  5. worried
  6. to make (sb) anxious
2 剧 jù
  1. theatrical work (play, opera, TV series etc)
  2. dramatic (change, increase etc)
  3. acute
  4. severe