I wrote a modeling program myself in Mathematica, which is a fiendish language.
From the businessweek.com
From Beatrix Potter to Harry Potter, fiendish food questions to test your wits.
From the guardian.co.uk
Just for fun try our fiendish words and numbers quiz compiled by William Hartston.
From the express.co.uk
He wants the cider doughnuts, not a fiendish, claustrophobic aerobic workout.
From the timesunion.com
While you're waiting, here's a fiendish little quiz for you to have a got at.
From the guardian.co.uk
It seems ludicrously simple but never is, is highly competitive and quite fiendish.
From the thisisbristol.co.uk
If you missed out on some fiendish frolics don't fear, writes Stuart Ojelay.
From the expressandstar.com
Or, in a fiendish twist, is it tied to the speed of our posts on TechCrunch?
From the techcrunch.com
Legislative leaders worry about the fiendish political complexities of such a project.
From the online.wsj.com
More examples
Demonic: extremely evil or cruel; expressive of cruelty or befitting hell; "something demonic in him--something that could be cruel"; "fires lit up a diabolic scene"; "diabolical sorcerers under the influence of devils"; "a fiendish despot"; "hellish torture"; "infernal instruments of war"; " ...
(fiendishly) diabolically: as a devil; in an evil manner; "his writing could be diabolically satiric"
Fiendish is the first album (previous album friction isn't considered official by the band) released by composer Phideaux Xavier.
Sinister; evil; conniving; in the manner of a fiend