눈썰미 Nun-sseol-mi

Speakers use this to describe someone who learns practical skills or physical tasks rapidly by watching others just once or twice. It frequently appears alongside descriptions of picking up a new skill, trade, or craft without formal instruction. The word combines with verbs indicating high capability, such as being good at it or having a distinct talent, as seen in expressions like 눈썰미가 좋다 and 눈썰미가 남다르다. It also appears in contexts where someone lacks this ability entirely.

Describing someone this way often highlights natural intuition and observational sharpness in a workplace or apprenticeship setting.

◆ The Detail Detective — Speakers use this when someone immediately spots subtle flaws, hidden elements, or minute visual details that escape the average observer. It turns up when describing an uncanny eye for catching discrepancies or catching onto things visually without explicit instruction. It commonly combines with modifiers like 남다르다 to describe an exceptional degree of this observant knack.

Can carry a sense of quiet admiration for someone's sharp, eagle-eyed perception, as if they possess an almost invisible scanner for imperfection.

◆ The Self-Taught Prodigy — Speakers reach for this when someone picks up a practical skill, such as cooking, drawing, or dancing, entirely through observation rather than formal lessons. It frequently pairs with verbs of having or assessing, combining into collocations like 눈썰미가 좋다, 눈썰미가 남다르다, and 눈썰미가 없다. It also appears in descriptions of learning by watching someone's example, such as picking up recipes from an elder's shoulder.

This often highlights a natural, unstudied talent rather than diligent practice, casting the learner as effortlessly gifted.