IPA: /ˈkæniəst/
KK: /ˈkænɪst/
The most careful and shrewd in making decisions or judgments, often showing good sense and practical wisdom.
She is the canniest investor in the market, always knowing when to buy and sell.
Comparative: cannier
Superlative: canniest
Canniest → It is formed from "canny" (from Scots *canny*, meaning shrewd or careful) and the suffix "-est" (indicating the superlative degree). The word "canniest" means the most shrewd or careful in a given context.
Think of someone who is the most 'shrewd' or 'careful' — that's what 'canniest' means, being the best at being wise in decisions.