Definition of shrewd

adjective (a)

• Inclining to shrew; disposing to curse or scold; hence, vicious; malicious; evil; wicked; mischievous; vexatious; rough; unfair; shrewish. (adjective)

  source: webster1913

adjective satellite (s)

• marked by practical hardheaded intelligence (adj.all)

  Synonym: astute, sharp
  

  Example:
  He was too shrewd to go along with them on a road that could lead only to their overthrow.
  

  source: wordnet30
• used of persons (adj.all)

  Synonym: calculating, calculative, conniving, scheming
  

  source: wordnet30

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