plastycznymi
Plastycznymi is the instrumental plural form of the Polish adjective plastyczny, which describes something related to the plastic arts, molding, or the ability to form materials. In Polish, adjectives agree with the noun they modify, and plastycznym forms appear in the instrumental case. For example: narzędziami plastycznymi (tools used in the plastic arts) and technikami plastycznymi (techniques of the plastic arts). Another common collocation is sztukami plastycznymi (the visual/plastic arts).
The root plast- comes from ancient terms meaning formed or molded, and it underpins several related words
As a grammatical form, plastycznymi functions to describe nouns in instrumental plural. It is not a standalone
In summary, plastycznymi is a specific adjective form used in Polish to indicate relation to the plastic