shh

/ʃː/
interjection
  1. Used to tell someone to be quiet or to make less noise.
    • Shh, everyone — the movie is starting.
    • The librarian put a finger to her lips and whispered, 'Shh.'
    • Shh! The baby is finally asleep.
What does "shh" mean? | whatsthatwordmean | whatsthatwordmean