psst

1. Psst is a sound that someone makes when they want to attract another person's attention secretly or quietly. 爲引起人的注意隱秘或輕聲發出的聲音

"Psst! Come over here!" one youth hissed furtively. “Psst！過來！”一個年輕人鬼鬼祟祟地發出嘶嘶聲。