courtesy

polite behaviour that shows respect for other people ความมีมารยาท, ความนอบน้อม, ความสุภาพ

Many support the new policy, calling it a reinforcement of a common courtesy.

Your ability to learn and communicate the basics in another language is a polite sign of courtesy.

What was missing was good manners, courtesy, and what we Thais can offer – a friendly smile.