The word "呜呼" is a classical Chinese interjection formed through a process of reduplication, where two characters with similar phonetic and semantic qualities are combined for emphatic effect. Both "呜" (wū) and "呼" (hū) are onomatopoeic characters that independently mimic sounds associated with sighing, lamenting, or exclaiming. When paired, they create a reinforced, bisyllabic expression that conveys strong emotion—such as grief, awe, or lament—far more powerfully than a single character could. This formation is not a modern compound but a frozen lexical item from literary Chinese, preserved in set phrases and historical texts to express profound sorrow or exclamation.