Sentence:  His merit introduced him to splendid tables and elegant acquaintance, but he did not find himself always qualified to join in the conversation. He was distressed by civilities, which he knew not how to repay, and entangled in many <WSD>ceremonial</WSD> perplexities, from which his books and diagrams could not extricate him. 
Meaning of the word marked with <WSD> tags:  Of, relating to, or used in a ceremony.