1. fiendishly

adverb. as a devil; in an evil manner.


  • devilishly

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Sentences with fiendishly

1. Adjective
The game takes the graphics and gameplay of that classic title and reworks them into a series of fiendishly difficult levels for advanced players.

2. Adverb
It's a lamentable fact that the freshest, best-tasting eggs are fiendishly difficult to peel when they're boiled, and that eggs a week or two older are much easier to work with.