Which term indicates sophistication and refinement?

The term "urbane" signifies a sense of sophistication and refinement, particularly in manners and style. It is often used to describe individuals who are polished, well-mannered, and cultured, embodying a certain elegance that is commonly associated with city life and cosmopolitan environments. This word conveys an overall impression of sophistication that is recognized in social interactions and the ability to navigate various social settings with grace and poise.

The other terms do not carry the same connotation of sophistication. "Vivid" pertains to something that is bright and clear, especially in terms of color or description, lacking the context of cultural refinement. "Sullen" describes a mood that is gloomy or sulky, which is quite the opposite of sophistication. "Indelible" relates to something that cannot be erased or forgotten, typically used in contexts to refer to lasting memories or impressions, rather than to personal refinement or sophistication.