sisekülje

Sisekülje is an Estonian term that denotes the inner side or inner surface of an object. The word is formed from sise- meaning inner and külg meaning side, and it is used in contexts where the interior face of a material or structure is being described. In everyday Estonian, more common terms such as sisepind or sisekülg are often used, but sisekülje appears in specialized or technical language.

In bookbinding and publishing, sisekülje can refer to the inside surface of a book’s cover or the lining material that faces the pages. The term is used when distinguishing the interior finish from the exterior appearance of the cover, boards, or spine. In textiles, sisekülje describes the interior lining of a garment or accessory, contributing to comfort, warmth, and drape. In architecture and product design, it can describe the internal surface of a enclosure, shell, or housing, contrasted with the outer surface (väljakülg).

Usage and terminology vary by field, and while sisekülje is understood in technical writing, it is less common in everyday speech. It essentially portraits the same concept as other expressions for interior surfaces, and writers may choose different terms depending on whether precision, style, or tradition is preferred.

See also: sisepind, sisekülg.