1. the state or quality of being without pain or discomfort
2. the quality of being easy or effortless to do or experience

Examples

• The dentist assured her of the procedure’s complete painlessness.
• Modern anesthesia has greatly improved the painlessness of surgery.
• The painlessness of the online registration process surprised him.
• She appreciated the painlessness of the new tax filing system.
• The injection’s painlessness made the vaccination experience much better.
• The painlessness of the transition to remote work was unexpected.