Shrewd /(?)/

Shrewd

a.
  1. Inclining to shrew; disposing to curse or scold; hence, vicious; malicious; evil; wicked; mischievous; vexatious; rough; unfair; shrewish. [Obs.]
    [Egypt] hath many shrewd havens, because of the great rocks that ben strong and dangerous to pass by.
    — Sir J. Mandeville.
    Every of this happy number That have endured shrewd days and nights with us.
  2. Artful; wily; cunning; arch.
    These women are shrewd tempters with their tongues.
  3. Able or clever in practical affairs; sharp in business; astute; sharp-witted; sagacious; keen; as, a shrewd observer; a shrewd design; a shrewd reply.
    Professing to despise the ill opinion of mankind creates a shrewd suspicion that we have deserved it.
    — Secker.