whoosh
noun
°A breathy sound like that of an object passing at high speed.
verb
°To make a breathy sound like a whoosh.
shush
verb
°To be quiet; to keep quiet.
"The shushing was louder than the children's whispers had been."
chuckle
noun
°A quiet laugh.
verb
°To laugh quietly or inwardly.
°(archaic) Sounds made by chicken.
synonyms: chortle, giggle, snigger, titter