The Word of the Day is etiquette, which refers to accepted social behaviors. It defines what is considered proper and expected in different situations. For instance, not replying to an invitation is seen as a major lapse in etiquette. The article cites an example from a literary review about characters and their adherence to etiquette at a charity event. Etiquette's origin traces back to the French word "étiquette," meaning "ticket." This French word itself evolved from a term for a label used for identification. In 16th-century Spain, the word was adopted and modified to "etiqueta." This Spanish term was used for written instructions detailing required court behavior. Ultimately, "etiqueta" came to describe both the court ceremonies and the documents outlining their rules. The French then broadened their original word's meaning to include proper court behavior alongside its "label" definition. By the mid-18th century, English speakers had adopted etiquette, applying it to all rules of polite conduct, not just those at court.