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Definition of sinister:

  1. Indicative of lurking evil or harm; boding covert danger; as, a sinister countenance.
  2. On the left hand, or the side of the left hand; left; - opposed to dexter, or right.
  3. Unlucky; inauspicious; disastrous; injurious; evil; - the left being usually regarded as the unlucky side; as, sinister influences.
  4. Wrong, as springing from indirection or obliquity; perverse; dishonest; corrupt; as, sinister aims.


dour, dim, opprobrious, saturnine, ugly, dismal, bootleg, fatal, bleak, mordant, non-white, malign, blackened, benighted, ignominious, heavy, dreary, ominous, minatory, glum, smutty, inauspicious, ill, blue, minacious, lowering, grim, evil, morose, black-market, dingy, sinistral, shameful, obscure, warn, black, baleful, alarming, moody, smuggled, dark-skinned, pitch-black, sorry, fateful, disconsolate, menacing, drab, glowering, coloured, contraband, dark, drear, sour, inglorious, wicked, threatening, disastrous, gloomy, forbidding, pitch-dark.

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