szybkim
Szybkim is the instrumental singular masculine form of the Polish adjective szybki, meaning fast or quick. It is used with masculine or neuter nouns in the instrumental case, and in predicative constructions after be, as in on jest szybkim człowiekiem (he is a fast/quick man). It can also appear in phrases governed by prepositions that require the instrumental case, for example z szybkim autem (with a fast car).
Morphology and forms: The base form is szybki (nominative masculine singular). The instrumental singular forms are
Usage notes: Szybkim is typically used in two main contexts—predicative expressions after być with a masculine
Etymology: The word szybki derives from the Polish stem szyb- meaning “fast,” with the standard adjectival suffix