a.

1. 精明的；狡猾的
   You made a shrewd investment there.

   你在那裡投資極為精明。

   Her brother is a shrewd businessman.

   她兄弟是個精明的生意人。

2. 機靈的，敏銳的，聰穎的
   His shrewd eyes looked across at his wife.

   他那敏銳的目光射向他的妻子。

adj.

1. having or showing sharp powers of judgement; astute.
2. archaic (of weather) piercingly cold.
   ▸(of a blow) severe.
   ▸mischievous; malicious.