fiendish
fien-dish
adjective
Extremely cruel, wicked, or cunning; devilishly difficult or unpleasant.
"Solving the fiendish crossword took all morning."
Thesaurus
Synonyms: demonic, hellish, infernal, diabolic, unholy, evil, satanic, diabolical
fien-dish
Extremely cruel, wicked, or cunning; devilishly difficult or unpleasant.
"Solving the fiendish crossword took all morning."
Synonyms: demonic, hellish, infernal, diabolic, unholy, evil, satanic, diabolical