- be quiet嘘（示意别作声）：
'Shush! Do you want to wake everyone?'
“嘘！你想吵醒每一个人吗？”
1
- an utterance of 'shush'“嘘”声：
the thumps were followed by shushes from the aunts.
重击声之后紧接着是姑妈们的“嘘”声。
1.1
- mass noun informal silence〈非正式〉安静：
could we have a little shush please?
请安静一点, 好吗？
2
- a soft swishing or rustling sound沙沙声; 瑟瑟声。
1
- with obj. tell or signal (someone) to be silent告诉（或示意）保持安静：
she shushed him with a wave.
她挥手示意他保持安静。
1.1
- no obj. become or remain silent变得安静; 保持安静：
Beth told her to shush.
贝思叫她安静一点。
2
- no obj., usu. with adverbial of direction move with or make a soft swishing or rustling sound沙沙地移动; 发出沙沙声：
I stood to watch a big liner shushing slowly past
我站在一边, 看着一艘大轮船沙沙地缓慢开过
as noun shushing she could hear the gentle shushing of the waves.她可以听见波浪发出轻柔的沙沙声。
词源
1920s: imitative.