1. the quality of being difficult to deal with or understand; complexity that causes problems
2. the quality of being deceptive or using cunning methods

Examples

• The trickiness of the math problem stumped even the best students.
• She was known for her trickiness in business negotiations.
• The trickiness of the recipe made it unsuitable for beginners.
• His trickiness with words often confused his listeners.
• The trickiness of the legal language required expert interpretation.
• The puzzle’s trickiness lay in its misleading clues.