Synonyms and Antonyms of fiendish
1 of, relating to, or worthy of an evil spirit <a fiendish delight in playing cruel tricks> Synonyms cacodemonic, demoniac (also demoniacal), demonian, demonic (also demonical), devilish, diabolical (or diabolic), Luciferian, satanic Related Words hellish, infernal; baleful, evil, sinister; malevolent, malicious, malignant; heinous, monstrous; black, immoral, iniquitous, nefarious, vicious, vile, villainous, wicked; barbarous, cruel, ferocious, inhuman, savage Near Antonyms celestial, heavenly; beneficent, benevolent, benign, benignant; godly, holy, sainted, saintly; ethical, good, moral, righteous, virtuous Antonyms angelic (or angelical)
2 having or showing the desire to inflict severe pain and suffering on others <shook with fiendish laughter as he watched his victims writhe in agony> Synonyms atrocious, barbaric, barbarous, brutal, brute, butcherly, cruel, heartless, inhuman, inhumane, sadistic, savage, truculent, vicious, wantonRelated Words hard-hearted, ironhearted, merciless, pitiless, ruthless, stonyhearted, unfeeling; fell, ferocious, grim; bloodthirsty, cutthroat, murderous, sanguinary, sanguine; catty, despiteful, hateful, malevolent, malicious, malign, malignant, mean, nasty, spiteful, vindictive; draconian, draconic, hardhanded, harsh, heavy-handed, oppressiveNear Antonyms tender, warm, warmhearted; charitable, clement, lenient, merciful, pitying; pacific, peaceable, peacefulAntonyms benign, benignant, compassionate, good-hearted, humane, kind, kindhearted, sympathetic, tenderhearted
Seen and Heard
What made you want to look up fiendish? Please tell us where you read or heard it (including the quote, if possible).