What is the Korean word for "one"?

The Korean word for "one" is "Ha Na." In the Korean language, numbers can be expressed in two counting systems: the native Korean numbers and the Sino-Korean numbers. "Ha Na" is part of the native Korean numbering system, which is used in everyday situations, such as counting objects or people.

Understanding this distinction is crucial because the native system is typically employed in social contexts and informal scenarios, while the Sino-Korean system, derived from Chinese, is more commonly used for formal occasions, counting money, and telling time. Thus, "Ha Na" serves as the correct term for "one" in situations where native Korean numbers are preferred.