1. most shrewd and careful in dealing with others; most astute in business or practical matters
Usage: superlative form of canny

Examples

• She was the canniest investor in the group, always spotting profitable opportunities.
• The canniest shoppers wait for end-of-season sales.
• He’s the canniest negotiator I’ve ever met.
• The canniest politicians know when to compromise.
• Among all the traders, she was the canniest at reading market trends.
• The canniest students start preparing for exams weeks in advance.