Koncertowym

Koncertowym is a grammatical form of the Polish adjective koncertowy, which means "concert-" or "related to a concert." It is not a standalone noun. The form appears when the adjective is inflected for case and number, describing nouns connected with concerts, such as plans, programs, schedules, or venues.

In particular, koncertowym is the instrumental singular masculine/neuter form of the adjective, and it is also used as the corresponding masculine/neuter form in the locative singular. This means it is common in phrases like z planem koncertowym (with a concert plan) and o planie koncertowym (about the concert plan), where the noun and the adjective agree in case.

In ordinary usage, koncertowy is more commonly seen in its nominative masculine singular form before the noun, as in plan koncertowy (the concert plan) or program koncertowy (the concert program). The feminine forms follow their own declension patterns (e.g., koncertowa, koncertową, koncertową, etc.), but koncertowym specifically surfaces in instrumental or locative contexts for masculine/neuter nouns.

Etymology and family: the form derives from the noun koncert (concert) with the adjectival suffix -owy, producing a standard Polish adjective meaning "concert-related." It belongs to the broader set of -owy adjectives that decline regularly across cases and numbers.

See also: koncertowy (the base adjective), koncert (the noun), sala koncertowa, plan koncertowy, program koncertowy.