Zasyp

Zasyp is a Polish noun that denotes material used to fill or cover an opening, cavity, or surface, or the act of filling itself. It is formed from the verb zasypać, meaning to bury or cover with earth, sand, snow, or other material. In technical contexts, zasyp commonly refers to backfill—soil, sand, gravel, or other approved material used to fill around pipes, foundations, or excavations after work is completed. The resulting filling can be described as zasyp or zasypanie, depending on the context and terminology of a given project.

In mining and geotechnical contexts, zasyp describes backfilling operations performed to restore ground stability after removal of material or to seal openings. Proper backfilling supports bearing capacity, drainage, and subsidence control, and it may involve specific specifications for grain size, compaction, and moisture content.

Outside technical jargon, the term zasyp is less common in casual speech, where more general terms such as backfill or cover are used. The word is primarily encountered in construction documents, engineering specifications, and mining reports in Polish.

Etymology and related terms: zasyp comes from zasypać (to bury/cover), with related forms such as zasypanie (the act of filling) and zasypać (the verb). The term is largely confined to Polish-language technical usage and is not widely used as a standalone concept in everyday language.