Genteel (adjective)

1. Refined and well-mannered, often in an affected or insincere way.
2. Having or showing refinement and good manners, often in an affected or insincere way.

Origin:

The word "genteel" comes from the french word "gentil" which means "of good birth or breeding". it was first used in the 17th century.

Examples:

1. She had a genteel accent and manners.
2. The party had a genteel atmosphere.
3. He had a genteel way of speaking.
4. The restaurant had a genteel decor.
5. She had a genteel manner that was not genuine.