歹毒的英文：
1.vicious; malicious

参考例句：

The sinister and vicious robbers kidnapped the professor.
歹毒的强盗绑架了教授。

vicious是什么意思：
adj. 恶意的；恶毒的；堕落的；凶猛的；剧烈的；有错误的

That's a vicious smear.
那是恶意中伤。

The drunkard led a vicious life.
这个醉汉过着堕落的生活。

The sinister and vicious robbers kidnapped the professor.
歹毒的强盗绑架了教授。

The companions with whom they will associate are more vicious
他们将结交的同伴更坏。

Such a vicious lie could be nothing but a stab in the back.
这样一种恶毒的谎言简直是暗箭伤人。

malicious是什么意思：
adj. 恶意的；恶毒的；蓄意的；怀恨的

Malicious,spiteful,or overbearing.
恶毒的、恶意的或专横的

Fierce, cruel, and malicious
凶戾狠毒

Subtle is the lord, but malicious he is not.
我们的主人很狡猾，好在他不怀歹意。

One cannot inure oneself altogether to such malicious criticism.
谁也不能总是忍受这种恶意批评。

Certain persons are malicious solely through a necessity for talking.
某些人仅仅为了饶舌的需要就不惜刻薄待人。