Synonyms of the word

sinister

• adj. Inauspicious, ominous, unlucky, illegitimate (as in bar sinister).
• adj. Evil or seemingly evil; indicating lurking danger or harm.
• adj. Of the left side.
• adj. (heraldry) On the left side of a shield from the wearer's standpoint, and the right side to the viewer.
• adj. (obsolete) Wrong, as springing from indirection or obliquity; perverse; dishonest.

alarming

• v. present participle of alarm.
• adj. causing apprehension, fear or alarm; frightening.

baleful

• adj. Portending evil; ominous.
• adj. Miserable, wretched, distressed, suffering.

black

• adj. (of an object) Absorbing all light and reflecting none; dark and hueless.
• adj. (of a place, etc) Without light.
• adj. (sometimes capitalized) Of or relating to any of various ethnic groups having dark pigmentation of the…
• adj. (chiefly historical) Designated for use by those ethnic groups which have dark pigmentation of the skin.
• adj. (card games, of a card) Of the spades or clubs suits. Compare red (“of the hearts or diamonds suit”).
• adj. Bad; evil; ill-omened.
• adj. Expressing menace, or discontent; threatening; sullen.
• adj. Illegitimate, illegal or disgraced.
• adj. (Ireland, informal) Overcrowded.
• adj. (of coffee or tea) Without any cream, milk, or creamer.
• adj. (board games, chess) Of or relating to the playing pieces of a board game deemed to belong to the "black"…
• adj. (typography) Said of a symbol or character that is solid, filled with color. Compare white (“said of a…
• adj. (politics) Related to the Christian Democratic Union of Germany.
• adj. Relating to an initiative whose existence or exact nature must remain withheld from the general public.
• n. (countable and uncountable) The colour/color perceived in the absence of light, but also when no light…
• n. (countable and uncountable) A black dye or pigment.
• n. (countable) A pen, pencil, crayon, etc., made of black pigment.
• n. (in the plural) Black cloth hung up at funerals.
• n. (sometimes capitalised, countable) A person of African, Aborigine, or Maori descent; a dark-skinned person.
• n. (billiards, snooker, pool, with the, countable) The black ball.
• n. (baseball, countable) The edge of home plate.
• n. (Britain, countable) a type of firecracker that is really more dark brown in colour.
• n. (informal, countable) blackcurrant syrup (in mixed drinks, e.g. snakebite and black, cider and black).
• n. (in chess and similar games, countable) The person playing with the black set of pieces.
• n. (countable) Part of a thing which is distinguished from the rest by being black.
• n. (obsolete, countable) A stain; a spot.
• v. To make black, to blacken.
• v. To apply blacking to something.
• v. (Britain) To boycott something or someone, usually as part of an industrial dispute.

dark

• adj. Having an absolute or (more often) relative lack of light.
• adj. (of colour) Dull or deeper in hue; not bright or light.
• adj. Hidden, secret, obscure.
• adj. Without moral or spiritual light; sinister, malign.
• adj. Conducive to hopelessness; depressing or bleak.
• adj. Lacking progress in science or the arts; said of a time period.
• adj. With emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction…
• n. A complete or (more often) partial absence of light.
• n. (uncountable) Ignorance.
• n. (uncountable) Nightfall.
• n. A dark shade or dark passage in a painting, engraving, etc.

evil

• adj. Intending to harm; malevolent.
• adj. Morally corrupt.
• adj. Unpleasant, as in 'an evil smell'.
• adj. Producing or threatening sorrow, distress, injury, or calamity; unpropitious; calamitous.
• adj. (obsolete) Having harmful qualities; not good; worthless or deleterious.
• adj. (computing, programming, slang) undesirable; harmful; bad practice.
• n. Moral badness; wickedness; malevolence; the forces or behaviors that are the opposite or enemy of good.
• n. Anything which impairs the happiness of a being or deprives a being of any good; anything which causes…
• n. (obsolete) A malady or disease; especially in the phrase king's evil (scrofula).

forbidding

• adj. highly unpleasant or disagreeable.
• adj. threatening or menacing.
• v. present participle of forbid.
• n. The act by which something is forbidden; a prohibition.

menacing

• adj. Suggesting imminent harm.
• adj. Threatening.
• v. present participle of menace.
• n. The act of making menaces or threats.

minacious

• adj. (now rare) Threatening, menacing.

minatory

• adj. Threatening, menacing.

ominous

• adj. Of or pertaining to an omen or to omens; being or exhibiting an omen; significant.
• adj. Specifically, giving indication of a coming ill; being an evil omen; threatening; portentous; inauspicious.

sinistral

• adj. Of, facing, or on the left side.
• adj. Left-handed.
• adj. (zoology, of certain spiral shells) Having the whorls of the spire revolving or rising to the left; reversed.
• adj. (geology) Having left lateral fault movement.

threatening

• v. present participle of threaten.
• adj. Presenting a threat; menacing; frightening.
• n. An act of threatening; a threat.