rzeczom
Rzeczom is the dative plural form of the Polish noun rzecz, meaning "thing" or "object." In Polish grammar, nouns decline for number and case; for rzecz, the dative plural is rzeczom. This form is used when the indirect object or recipient of an action is a group of things, or when the noun is governed by verbs or prepositional phrases requiring the dative case. In practice, rzeczom appears most often in written or formal language, and is frequently modified by demonstratives or adjectives, for example różnym rzeczom (“to various things”).
A typical example is the sentence Przyglądaj się różnym rzeczom, meaning “Pay attention to various things.” This
Etymology and morphology: The form rzeczom is formed from the base noun rzecz plus the common dative
See also: Polish grammar, noun declension, and the base noun rzecz.