“Fiendish” in Japanese
Short answer
Fiendish in Japanese is “獰悪” (douaku). Full meaning: violent, cruel, fiendish.
Other ways to say “Fiendish” in Japanese
凶悪
kyouaku atrocious, heinous, fiendish, brutal, vicious
兇悪
kyouaku atrocious, heinous, fiendish, brutal, vicious
どう悪
douaku violent, cruel, fiendish
大逆非道
taigyakuhidou heinous, treacherous, atrocious, diabolic, fiendish, inhuman
大逆無道
taigyakumudou heinous, treacherous, atrocious, diabolic, fiendish, inhuman
悪逆非道
akugyakuhidou heinous, treacherous, atrocious, diabolic, fiendish, inhuman
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