Genteel/Gentility

One might suspect that the root word to gentility would be gentile. That is not so. Indeed, the word gentility is based on the word genteel. When one is genteel, or demonstrates gentility, they are perfectly mannered, well-bred, and sometimes . . . just sometimes . . . a little snooty. But, never tell them that, because that wouldn't be genteel. Instead, one might consider gently telling them, "The way I was brought up, we would never do something (or say something) such as you did just now." Then one would be telling them, with gentility, that one does not approve of their behavior. 

Examples of gentility would be the royal family in England. They present their best selves to the public and show us all how to behave. They are genteel.

A genteel​ family portrait

A family portrait lacking gentility