sinister

/ˈsɪnɪstər/
adjective
  1. Giving the impression that something bad, evil, or harmful is happening or will happen.
    • His sinister smile made everyone feel uneasy.
    • The old house had a sinister look with its broken windows and overgrown garden.
    • She noticed a sinister figure lurking in the shadows.
  2. Suggesting or threatening harm or evil; ominous.
    • The dark clouds had a sinister appearance, warning of a coming storm.
    • The letter contained a sinister threat that frightened the family.
    • There was something sinister about the way he whispered to his friend.
What does "sinister" mean? | whatsthatwordmean | whatsthatwordmean