Defn: An implacable or malicious foe; one who is diabolically wicked or cruel; an infernal being; — applied specifically to the devil or a demon. Into this wild abyss the wary fiend Stood on the brink of Hell and looked a while. Milton. O woman! woman! when to ill thy mind Is bent, all hell contains no fouler fiend. Pope.

FIENDFUL
Fiend"ful, a.

Defn: Full of fiendish spirit or arts. Marlowe.
— Fiend"ful*ly, adv.

FIENDISH
Fiend"ish, a.

Defn: Like a fiend; diabolically wicked or cruel; infernal;
malignant; devilish; hellish.
— Fiend"ish*ly, adv.
— Fiend"ish*ness, n.

FIENDLIKE
Fiend"like`, a.

Defn: Fiendish; diabolical. Longfellow.

FIENDLY
Fiend"ly, a. Etym: [AS. feóndlic.]

Defn: Fiendlike; monstrous; devilish. [Obs.] Chaucer.

FIERASFER
Fi`e*ras"fer, n. Etym: [NL.] (Zoöl.)