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ADJ-GRADED
(計劃、行動、裝置等)巧妙的，富有想象力的
A fiendish plan, action, or device is very clever or imaginative.
例句
...a fiendish plot.
巧妙復雜的計謀
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ADJ-GRADED
極其困難的;極具挑戰性的
A fiendish problem or task is very difficult and challenging.
例句
A rather neat option allows you to design your own fiendish puzzle.
只要干凈利落地做一個選擇，你就能自己設計出難以解開的謎題。
...the fiendish difficulty of the questions.
這些問題極度困難之處
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ADJ-GRADED
以殘忍為樂的;惡魔般的
A fiendish person enjoys being cruel.
例句
This was a fiendish act of wickedness.
這是極其惡毒的行為。