Main Entry: fiend·ish

Pronunciation: \ˈfēn-dish\

Function: adjective

Date: 1529

1 : perversely diabolical <took a fiendish pleasure in hurting people>
2 : extremely cruel or wicked
3 : excessively bad, unpleasant, or difficult <fiendish weather>

— fiend·ish·ly adverb

— fiend·ish·ness noun