What does cheon na mean in Korean?

"Cheon na" (천나) is a Korean expression that translates to "Oh my!" or "Goodness!" in English. It is often used to express surprise, shock, or exasperation in response to a situation. The phrase combines "cheon" (천), meaning "heaven" or "sky," with "na," an informal exclamation, conveying a sense of disbelief or emotion.