安靜啦！

Be quiet!

Silence!

Source: Tatoeba

Sentence Composition

1 安靜 ānjìng
  1. quiet
  2. peaceful
  3. calm
=2 啦 lā
  1. (onom.) sound of singing, cheering etc
  2. (phonetic)
  3. (dialect) to chat
=2 啦 la
  1. sentence-final particle, contraction of 了啊, indicating exclamation
  2. particle placed after each item in a list of examples