unscrupulous

adj.

肆无忌惮的，不择手段的，无道德原则的；没有节操的；恣意；

1. You always take part with the unscrupulous man.
   你总是袒护那些肆无忌惮的人。
2. He once did me such an unscrupulous shot in the eye.
   他曾经如此肆无忌惮地恶意中伤过我。
3. He was utterly unscrupulous in his competition with rival firms.
   他与对立公司竞争完全不讲道德。

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