Significado de "fiendish" - Learner’s Dictionary

fiendish

adjective uk us /ˈfiːndɪʃ/
EVIL

evil or cruel:

a fiendish attack
DIFFICULT

very difficult or complicated:

a fiendish crossword
fiendishly adverb mainly UK

extremely:

fiendishly clever/difficult

(Definición de fiendish del Cambridge Learner's Dictionary © Cambridge University Press)