sufitowych
Sufitowych is a form of the Polish adjective sufitowy, which means ceiling-related or relating to the ceiling. In Polish, adjectives agree with the noun they modify in gender, number, and case. The ending -owych corresponds to the genitive plural (and some related cases) of this type of adjective, so sufitowych appears when the head noun is in a plural genitive construction.
In practice, sufitowych occurs in technical or formal contexts describing ceiling-related items whose governing noun is
Etymology and related terms: the noun sufит means ceiling, from which the adjective sufitowy is derived. Related
See also: Sufit, sufитowy, panele sufitowe, listwy sufitowe.