"Cas" Natural Recordings by Native Speakers
Cas is an abbreviation of the word "casual". As an adjective, casual refers to something or someone that is relaxed and informal, often lacking in formality or structure. For example, a casual dress code might indicate that people can wear comfortable clothes, rather than a suit and tie.
Carystus is a surname of Greek origin. It refers to a city in ancient Greece, which is now a archaeological site in the region of Evia. The city was known for its rich history, culture, and architecture. The surname Carystus is likely derived from the city's name and was likely borne by people who originated from or had ties to the city.