Shrewd a. [Compar. Shrewder superl. Shrewdest.]
  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.   --Shak.
  2. Artful; wily; cunning; arch.
     These women are shrewd tempters with their tongues.   --Shak.
  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.
  Syn: -- Keen; critical; subtle; artful; astute; sagacious; discerning; acute; penetrating.
  Usage: Shrewd, Sagacious. One who is shrewd is keen to detect errors, to penetrate disguises, to foresee and guard against the selfishness of others. Shrewd is a word of less dignity than sagacious, which implies a comprehensive as well as penetrating mind, whereas shrewd does not.
  -- Shrewd*ly, adv. -- Shrewd*ness, n.
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