Biernym
Biernym is the instrumental singular masculine form of the Polish adjective bierny, meaning passive, inactive, or indifferent. It is used to modify a masculine noun in the instrumental case, often in constructions that describe a role or state, especially after verbs that denote becoming or functioning as something.
In practice, biernym appears most often in predicative or descriptive phrases involving a noun in instrumental
Grammatical role and nuance: bierny as an adjective conveys lack of activity, engagement, or initiative. It
Etymology and related forms: bierny is a native Polish word with cognates in other Slavic languages, used
See also: Polish adjectives, instrumental case, predicative constructions in Polish.