fiend·ish 
/ˈfi:ndɪʃ/ adjective
/ˈfi:ndɪʃ/ adjective [more fiendish; most fiendish] 1 : very evil or cruel
▪ a fiendish murderer ▪ He takes a fiendish delight in hurting people. ▪ a fiendish contraption ▪ a fiendish [=diabolical] plot to destroy the world 2 : extremely bad, unpleasant, or difficult
▪ fiendish weather ▪ a fiendish problem
▪ a fiendish murderer ▪ He takes a fiendish delight in hurting people. ▪ a fiendish contraption ▪ a fiendish [=diabolical] plot to destroy the world
▪ fiendish weather ▪ a fiendish problem
— fiend·ish·ly adverb
▪ a fiendishly clever plot ▪ a fiendishly hot sun ▪ a fiendishly coldhearted murderer ▪ fiendishly complex tools and machinery
▪ a fiendishly clever plot ▪ a fiendishly hot sun ▪ a fiendishly coldhearted murderer ▪ fiendishly complex tools and machinery
— fiend·ish·ness noun [noncount]
▪ a plot of incredible fiendishness
▪ a plot of incredible fiendishness
