shrewd

adjective

• Showing clever resourcefulness in practical matters.
• Artful, tricky or cunning.
• Streetwise.
• Knowledgeable, intelligent, keen.
• Nigh accurate.

  "a shrewd guess"

• Severe, intense, hard.

  "a shrewd blow, or assault"

• Sharp, snithy, piercing.

  "a shrewd wind"

• Bad, evil, threatening.
• Portending, boding.
• Noxious, scatheful, mischievous.
• Abusive, shrewish.
• Scolding, satirical, sharp.