눈을 속이다.

The Korean phrase '눈을 속이다' (nuneul sogida) literally translates to 'to deceive the eyes.' Let's break down its components: * **눈 (nun):** This directly translates to 'eye' or 'eyes.' * **-을 (-eul):** This is an object particle in Korean, indicating that '눈' is the direct object of the verb. * **속이다 (sogida):** This verb means 'to deceive,' 'to trick,' 'to cheat,' or 'to fool.' The phrase's origin lies in the fundamental concept that deception often involves manipulating what someone perceives visually or mentally, hence 'deceiving the eyes.' While a specific historical document or event pinpointing its exact coinage is difficult to locate, the structure and meaning are deeply rooted in the Korean language's descriptive nature. The act of deception, or trickery, is a universal human experience, and phrases to describe it exist in all languages. '눈을 속이다' is a very common and idiomatic way to express this in Korean, implying that the deception is so effective that it can even fool one's perception or judgment. It emphasizes the misleading visual or perceptual aspect of the trick. This idiom has been in use for a considerable amount of time, likely for centuries, given the stability of basic Korean vocabulary and idiomatic expressions related to fundamental human actions and perceptions.