suljettu

Suljettu is a Finnish adjective and past passive participle derived from the verb sulkea, meaning to close. It describes something that has been closed, shut, or sealed, either physically or figuratively. The form is used with nouns to indicate the state of being closed, for example, "suljettu ovi" (a closed door), "suljetut ovet" (closed doors), or "suljettu kioski" (a closed kiosk). It can refer to doors, windows, shops, roads, events, or access to places.

Morphology and usage: The participle "suljettu" is formed with the suffix -ttu from the verb stem sulje-. In Finnish it functions as both an adjective and a past participle. It inflects like a regular Finnish adjective, for instance "suljettu ovi" (nominal singular), "suljetut ovet" (nominal plural), or "suljettuun oveen" (illative singular). In everyday language, signs and announcements often use "suljettu" to indicate temporary closure or restricted access.

Context and nuance: Beyond physical closures, "suljettu" can describe restricted or unavailable status in various contexts, such as "suljettu tila" (closed space) or "suljettu tapahtuma" (closed event). In mathematics, the term "suljettu joukko" refers to a closed set, describing a set that contains all its limit points within a given topological space; its complement is open.

Related terms: The antonyms are "auki" (open) and "kiinni" (shut), with "suljettu" often emphasizing a completed or deliberate closure.