Wierzchu

Wierzchu is the genitive singular form of the Polish noun wierzch. Wierzch denotes the upper surface or outer layer of an object—the top side or exterior coat. It describes the part that faces upward or outward, in contrast to the bottom, or spód.

In everyday language, wierzch appears in phrases that indicate position on or at the top, such as na wierzchu meaning on the surface or on top of something. In culinary contexts, the wierzch can refer to the crust or browned top of bread and pastries, for example wierzch chleba or na wierzchu ciasta.

In science and engineering, terms such as warstwa wierzchnia or the adjective wierzchni are used to denote the outermost or upper surface of materials, soil, rock, or other substances. The concept serves as a general label for the exterior part across disciplines, with wierzchni describing something related to the upper surface.

Grammar notes: wierzchu is the genitive singular of wierzch; other forms include wierzch (nominative and accusative) and wierzchem (instrumental). The word is primarily a common noun describing physical surfaces and layers, but it also appears in fixed expressions and technical terms to distinguish upper from lower parts.