Search Result for "fiendish": 
Wordnet 3.0

ADJECTIVE (1)

1. extremely evil or cruel; expressive of cruelty or befitting hell;
- Example: "something demonic in him--something that could be cruel"
- Example: "fires lit up a diabolic scene"
- Example: "diabolical sorcerers under the influence of devils"
- Example: "a fiendish despot"
- Example: "hellish torture"
- Example: "infernal instruments of war"
- Example: "satanic cruelty"
- Example: "unholy grimaces"
[syn: demonic, diabolic, diabolical, fiendish, hellish, infernal, satanic, unholy]



The Collaborative International Dictionary of English v.0.48:

Fiendish \Fiend"ish\, a.
   Like a fiend; diabolically wicked or cruel; infernal;
   malignant; devilish; hellish. -- Fiend"ish*ly, adv. --
   Fiend"ish*ness, n.
   [1913 Webster]


WordNet (r) 3.0 (2006):

fiendish
    adj 1: 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"; "satanic cruelty"; "unholy grimaces"
           [syn: demonic, diabolic, diabolical, fiendish,
           hellish, infernal, satanic, unholy]