unscrupulous
adj. 无道德原则的，肆无忌惮的
例句
These kids are being exploited by very unscrupulous people.
这些孩子正被极不道德的人利用。
《柯林斯英汉双解大词典》
The new law will be a charter for unscrupulous financial advisers.
新的法律会使不诚实的金融顾问有机可乘。
《牛津词典》
When he is without virtue, man is the most unscrupulous and savage of the animals.
一旦失去美德，人就是最不讲道德、最为凶残的野兽。
