shrewd /ʃruːd/ BrE AmE adjective
[ Date: 1200-1300 ; Origin: shrew in the old meaning 'very bad man' ]
1 . good at judging what people or situations are really like:
Malcolm is a shrewd businessman.
She was shrewd enough to guess who was responsible.
Capra looked at her with shrewd eyes.
2 . well judged and likely to be right:
a shrewd decision
Bridget has a shrewd idea of what will sell.
—shrewdly adverb :
‘Something tells me you’ve already decided,’ he said shrewdly.
—shrewdness noun [uncountable]