clever; shrewd; keen
Her professors immediately noticed her because of her astute questions and comments during lectures.
astus (cunning, cleverness, adroitness) (Latin)
A (MEANS NOT)+STU (STUPID). well think of someone who is NOT STUPID, MEANS he is very WISE, AND INTELLIGENT. Sounds like statue. some politicians are wise and shrewd to built their own statues. they clearly see the advantage. It an also b remembered by ACUTE, that has the same meaning, sharp, shrewd.