大声疾呼 dà shēng jí hū

DEFINITIONS

  1. to call loudly (idiom); to get people's attention
  2. to make one's views known

CHARACTERS

大 dà big, great, vast, large, high
声 shēng sound, voice, noise; tone; music
疾 jí illness, disease, sickness; to hate
呼 hū breathe sigh, exhale; call, shout