sinister

Meanings

• threatening or foreshadowing evil or tragic developments
  • "sinister storm clouds"
  • "a sinister smile"
• stemming from evil characteristics or forces; wicked or dishonorable; ; ; ; ; ; ; -Thomas Hardy
  • "the scheme of some sinister intelligence bent on punishing him"
• on or starting from the wearer's left
  • "bar sinister"

Synonyms

baleful, black, dark, forbidding, menacing, minacious, minatory, ominous, threatening