"누" is a Korean word that translates to "who" in English. It is commonly used in questions to inquire about a person's identity. In everyday conversation, people might ask "누예요?" which means "Who is it?" This word is essential for communication, especially when trying to learn more about someone. In the context of the Korean language, "누" can also be part of various expressions and phrases. For example, it can be combined with other words to form questions about relationships or roles, such as "누구" meaning "who" in a more general sense. Understanding "누" is fundamental for effective communication in Korean culture.