be quiet

Shush! Do you want to wake everyone?

an utterance of ‘shush’

the thumps were followed by shushes from the aunts

a soft swishing or rustling sound

the ‘shush, shush, shush’ of a broom on the tent's groundsheet

tell or signal (someone) to be silent

she shushed him with a wave

move with or make a soft swishing or rustling sound

I stood to watch a big liner shushing slowly past