1. the quality of being secretive, underhanded, or deceptive in behavior

Examples

• His sneakiness made it hard for others to trust him.
• The cat’s sneakiness allowed it to catch the mouse off guard.
• She was caught off guard by her friend’s sneakiness.
• The politician’s sneakiness was exposed by investigative reporters.
• Children often display sneakiness when trying to avoid bedtime.
• The thief’s sneakiness helped him avoid detection for months.