All fiendish synonyms
fiend·ish
F f adj fiendish
- brutish — If you describe a person or their behaviour as brutish, you think that they are brutal and uncivilised.
- nefarious — extremely wicked or villainous; iniquitous: a nefarious plot.
- cruel — Someone who is cruel deliberately causes pain or distress to people or animals.
- demonic — Demonic means coming from or belonging to a demon or being like a demon.
- devilish — A devilish idea or action is cruel or unpleasant.
- diabolic — Diabolic is used to describe things that people think are caused by or belong to the Devil.
- hellish — of, like, or suitable to hell; infernal; vile; horrible: It was a hellish war.
- inhuman — lacking qualities of sympathy, pity, warmth, compassion, or the like; cruel; brutal: an inhuman master.
- malicious — full of, characterized by, or showing malice; intentionally harmful; spiteful: malicious gossip.
- sadistic — pertaining to or characterized by sadism; deriving pleasure or sexual gratification from extreme cruelty: a sadistic psychopath.
- satanic — of Satan.
- savage — fierce, ferocious, or cruel; untamed: savage beasts.
- vicious — addicted to or characterized by vice; grossly immoral; depraved; profligate: a vicious life.
- wicked — evil or morally bad in principle or practice; sinful; iniquitous: wicked people; wicked habits.
- demonical — inspired as if by a demon, indwelling spirit, or genius.
- atrocious — If you describe something as atrocious, you are emphasizing that its quality is very bad.
- beastly — If you describe something as beastly, you mean that it is very unpleasant.
adjective fiendish
- evil — Profoundly immoral and malevolent.
- brutal — A brutal act or person is cruel and violent.
- monstrous — frightful or hideous, especially in appearance; extremely ugly.
- villainous — having a cruel, wicked, malicious nature or character.
- malevolent — wishing evil or harm to another or others; showing ill will; ill-disposed; malicious: His failures made him malevolent toward those who were successful.
- wretched — very unfortunate in condition or circumstances; miserable; pitiable.
- barbarous — If you describe something as barbarous, you strongly disapprove of it because you think that it is rough and uncivilized.
- diabolical — If you describe something as diabolical, you are emphasizing that it is very bad, extreme, or unpleasant.
- cunning — Someone who is cunning has the ability to achieve things in a clever way, often by deceiving other people.
- ingenious — characterized by cleverness or originality of invention or construction: an ingenious machine.
- clever — Someone who is clever is intelligent and able to understand things easily or plan things well.
- crafty — If you describe someone as crafty, you mean that they achieve what they want in a clever way, often by deceiving people.
- brilliant — A brilliant person, idea, or performance is extremely clever or skilful.
- difficult — not easily or readily done; requiring much labor, skill, or planning to be performed successfully; hard: a difficult job.
- trying — extremely annoying, difficult, or the like; straining one's patience and goodwill to the limit: a trying day; a trying experience.
- impossible — not possible; unable to be, exist, happen, etc.
- perplexing — to cause to be puzzled or bewildered over what is not understood or certain; confuse mentally: Her strange response perplexed me.
- hard — not soft; solid and firm to the touch; unyielding to pressure and impenetrable or almost impenetrable.
- tricky — given to or characterized by deceitful tricks; crafty; wily.