Fiend·ish a. Like a fiend; diabolically wicked or cruel; infernal; malignant; devilish; hellish. -- Fiend*ish*ly, adv. -- Fiend*ish*ness, n.
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fiendish
adj : 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, hellish, infernal, satanic,
unholy]