'Fiendish' definitions:

Definition of 'fiendish'

(from WordNet)
adjective
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]

Definition of 'Fiendish'

From: GCIDE
  • 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]

Words containing 'Fiendish'