1. most cunning, crafty, or sly; superlative form of wily
Usage: superlative form

Examples

• The fox is often considered the wiliest animal in the forest.
• She was the wiliest negotiator on the team, always finding creative solutions.
• The wiliest criminals are often the hardest to catch.
• He used his wiliest tactics to win the chess match.
• Among all the politicians, she was known as the wiliest strategist.
• The wiliest students found ways to finish the test early.