1. 恶魔似的：fieldwork 野战工事 | fiendish 恶魔似的 | fiendishlyheinously 极恶地

2. 极其残忍的：demon 恶魔 | fiendish 极其残忍的 | malevolence 恶意

3. 极凶恶的：outlandish 稀奇古怪的 | fiendish 极凶恶的 | modish 时髦的

4. fiendish

4. 恶魔似的; 极坏的; 残忍的 (形)：fiend 魔鬼, 能手, 邪神 (名) | fiendish 恶魔似的; 极坏的; 残忍的 (形) | fiendishly 恶魔似地; 极坏地; 残忍地 (副)

1. (计划、行动、装置等)巧妙的，富有想象力的
    A fiendish plan, action, or device is very clever or imaginative.

fiendish

    e.g. ...a fiendish plot.
           巧妙复杂的计谋

2. 极其困难的;极具挑战性的
    A fiendish problem or task is very difficult and challenging.

    e.g. A rather neat option allows you to design your own fiendish puzzle.
           只要干净利落地做一个选择，你就能自己设计出难以解开的谜题。
    e.g. ...the fiendish difficulty of the questions.
           这些问题极度困难之处

3. 以残忍为乐的;恶魔般的
    A fiendish person enjoys being cruel.

fiendish什么意思

    e.g. This was a fiendish act of wickedness.
           这是极其恶毒的行为。

1. extremely evil or cruel
    expressive of cruelty or befitting hell

    e.g. something demonic in him--something that could be cruel
           fires lit up a diabolic scene
           diabolical sorcerers under the influence of devils
           a fiendish despot
           hellish torture
           infernal instruments of war
           satanic cruelty
           unholy grimaces

    Synonym: demonicdiabolicdiabolicalhellishinfernalsatanicunholy