Category: Part of speech:
Of or like a devil; wicked; cruel; diabolic
Served without milk or cream:
Containing errors or alterations, especially ones that prevent proper understanding or use:
Likely to be a hindrance; disadvantageous:
(Obsolete) Auspicious; favorable.
Making or implying threats:
Of or serving as an omen; esp., having the character of an evil omen; threatening; sinister
The definition of adverse is unfavorable or acting against a person, goal or circumstance.
Showing ill will; malicious
The definition of deleterious is something that is harmful or damaging.
The definition of fortunate is someone or something that is lucky or favorable, or someone who is materially well-off.
Apocalyptic is defined as something that refers to the Book of Revelation.
Harmful or malignant in intent or effect:
Deserving to be despised; contemptible
Of, concerning, or characteristic of the devil; satanic.
The definition of dire is something so bad or scary that it causes distress or terror.
Disposed to lie, cheat, defraud, or deceive.
Tending or threatening to impede progress: Causing fear; of capable of causing fear; scary.
Grim is defined as stern or unmoving.
Located on the left side of a person facing downstream:
Having, showing, or caused by malice; spiteful; intentionally mischievous or harmful
Dishonest and sneaky; underhanded.
Resulting or likely to result in misfortune; inauspicious:
Able to be depended on for the discharge of obligations incurred; of unimpaired credit.
1822, T. Creevey, Reminiscences, 28 Jul: Possessing or manifesting love for mankind.
Strongly suggestive of great harm, menace, or evil
Of a menacing or threatening nature; minatory.
Conveying or constituting a threat
Characterized by foreboding
The definition of malignant is something evil or intending harm, a tumor that is spreading, or a disease that is invasive.
Causing or capable of causing harm; injurious.
Portending harm; ominous.
The definition of obnoxious is someone or something that is very annoying or offensive.
Pitiful; wretched; miserable
The definition of pernicious is deadly or very destructive. Producing, or resulting in, good chance, or unexpectedly; favorable; auspicious; fortunate.
Contrary to what is right or good; wicked or depraved: Synonym Study
is applied to that which is regarded as having an inherent tendency toward evil or destruction a malign doctrine
refers to that which is menacing to the degree of being deadly, destructive, pernicious, etc. a baleful influence
applies to that which can be interpreted as presaging imminent danger or evil a sinister smile
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sinister. In this page you can discover 71 synonyms, antonyms, idiomatic expressions, and related words for sinister, like: devilish, evil, black, bad, hurtful, corrupt, poisonous, unfavorable, dexter, threatening and malevolent.