"Uncan" is a variant of "unco," carrying the same range from merely strange to genuinely supernatural, the sense of something outside the familiar and safe. It appears in older Scots verse and in the ballad tradition, where the strange and the supernatural are constant presences. The word's root meaning of "unknown" gives it an existential quality — the uncan is what lies beyond knowledge and comfort — and in poetry it marks the threshold of experience where the rational gives way to wonder, fear, and the uncanny. It is a word for the edge of the known world.

Uncan is a variant form of "unco" (strange, uncanny) that appears in some regional dialects and older texts. Like "unco," it derives from "uncouth" in its original sense of unknown and unfamiliar rather than the modern sense of crude or ill-mannered. For students studying regional variation within Scots, "uncan" illustrates how the dialect is not a monolithic entity but a family of related forms with local variation. Its rarity in mainstream texts makes it primarily of interest to scholars of dialect literature and to those working with local material. Understanding variant forms like "uncan" alongside "unco" is part of developing genuine fluency with the full range of historical Scots.