Adjective: shrewd (shrewder,shrewdest) shrood
- Marked by practical hardheaded intelligence
"he was too shrewd to go along with them on a road that could lead only to their overthrow";
- astute, sharp, argute [literary], savvy [informal]
- Acting with or showing clever self-interest or cunning
"the most shrewd and selfish men in the community";
- calculating, calculative, conniving, scheming
Derived forms: shrewdest, shrewder