Which word describes someone who is highly sophisticated?

The word "urbane" is indeed the term that best describes someone who is highly sophisticated. "Urbane" refers to a person who is suave, courteous, and refined in manners, showcasing a polished way of interacting with others. This sophistication often stems from extensive social experience, typically in a cosmopolitan environment. Such individuals tend to exhibit an understanding of complex social nuances, making them charming and well-mannered in various circumstances.

The other words offered do not convey the same meaning. "Trite" suggests something that is overly familiar or lacking originality, which contrasts sharply with sophistication. "Utility" pertains to usefulness or practicality, without any implication of social or cultural refinement. Finally, "vanquish" means to defeat or overcome, particularly in a battle or contest, which is unrelated to the concept of sophistication. This distinction highlights why "urbane" is the most suitable choice in the context of describing someone who is highly sophisticated.