In etymology they may well have a shared origin, but their current meanings are quite different. Propriety is about correct behaviour, while a proprietor is the owner and operator of a business. Of course, a proprietor should behave with propriety !

It's the owner of something, the person that has a property!

It’s an owner of a business or if you want to be more specific,an owner of property. Hope that helps. Good luck 👍🏾

在绝大多数中国人眼中，"老实"都是一个贬义词。换句话说，严守诺言、遵守规则，被人嘲笑为"傻"、"幼稚";不遵守规则，通过违反规则来攫取利益，被很多人认为是聪明、灵活。"老实"这个词在英文中找不到任何一个词和它是严格对应的，而且在英美文化中是严重鄙视不遵守规则的行为的。英美人民做任何事都喜欢签合同，然后按照合同严格执行。比如，美国的宪法五十年都改不了一次，而中国的宪法不到三年就改一次，而且是任意篡改。您觉得我们的和谐社会一点都不和谐，共同富裕一点都不富裕，和这种全民不遵守规则、不遵纪守法有没有关系呢？