* quiet
a. 輕聲的; 安靜的
We'll have to be quiet so as not to wake the baby.
我們得安靜點，免得吵醒孩子。
* acquit
v. 宣判...無罪
All the defendants were acquitted.
所有被告都被宣判無罪.
* acquiesce
v. 默許; 順從
Oil companies have been accused of acquiescing in the pollution of the ocean.
石油公司被指控對海洋污染的問題袖手旁觀。
* disquiet
n. 不安；憂慮；煩惱
There is considerable public disquiet about the safety of the new trains.
公眾對新型列車的安全深感憂慮。

* disquieting
a. 令人不安的，使人憂慮的
He found Jean's manner disquieting.
他覺得瓊的舉止讓人憂慮。
* tranquil
adj. 平靜的; 安靜的; 安寧的
lead a tranquil life in the country
在鄉間過著寧靜的生活
* tranquillity
n. 平靜：安靜的性質或狀態；寧靜