alareunan

Alareunan is the genitive form of the Finnish noun alareuna, meaning the lower edge or border of an object, shape, or area. The term appears in everyday and technical Finnish to describe the bottom boundary in diagrams, drawings, or physical components. Etymology: it combines ala- (“under”) with reuna (“edge”), forming alareuna, of which alareunan is the possessive/genitive form used in phrases.

Usage and scope: In technical and descriptive language, alareunan denotes the lower edge of a polygon, a sheet, a window, a shelf, or similar elements. The genitive form alareunan is used to specify the relation to that bottom boundary, as in phrases such as laa­tikon alareunan pituus (the length of the lower edge of the box) or ikkunan alareunan muoto (the shape of the lower edge of the window). In Finnish, the construct is common in geometry, design, architecture, and manufacturing descriptions.

Examples:

- Laatikon alareunan pituus on 25 cm. (The length of the lower edge of the box is 25 cm.)

- Ikkunan alareunan muoto on suoraviivainen. (The shape of the lower edge of the window is straight.)

- Seinän alareunan linja on tasainen. (The line of the lower edge of the wall is even.)

Notes: Alareunan is not a separate technical concept beyond its ordinary grammatical use. It functions as a case form of alareuna and appears in phrases that qualify a part located at the bottom. Related terms include alareuna (the lower edge) and yläreuna (the upper edge).