What is aish in Korean?

"Aish" is not a Korean word. It's likely you're thinking of "Aish" or "Aish!" which is a Korean interjection used to express frustration, annoyance, or surprise.

It's similar to English expressions like:

* "Ugh!"

* "Oh, man!"

* "Jeez!"

It's often written as "아이씨" in Korean, but pronounced more like "Aish" in English.