adj.法律不许可的,非法的;不正当的;
例句:
an illicit love affair
不正当的风流韵事
They were prosecuted for illicit liquor selling.
他们因私卖烈酒而被起诉.
I'm just starting to feel like we're having an illicit affair.
我开始觉得我们在做不好的事情了.