oh, wow, gosh (expresses surprise, at something positive or negative) · oops (after making a mistake) · ow (expresses physical or mental pain or compassion)
alternative form of hoy: expression used to call the attention of somebody: hey!
köken: Probably a natural expression, as may be inferred from its presence with similar meaning in many other unrelated languages: English oi, Japanese おい (oi), Yiddish אוי (oy, “oh, oy”), etc.