discreet 
英 [dɪˈskriːt]  美 [dɪˈskriːt] 
adj. 谨慎的

例句：
They were gossipy and not always discreet. 

他们喜欢说长道短，而且常常口无遮拦。

She's making a few discreet inquiries. 

她正旁敲侧击地问着几个问题。

We were very discreet about the affair. 

我们对这件事很谨慎。

He followed at a discreet distance. 

他跟在后面，小心地保持着距离。

She wore discreet jewellery. 

她戴着素净的首饰。