wymagajcymi
Wymagajcymi is most likely a non-diacritic rendering of the Polish instrumental plural form wymagającymi, which is the instrumental plural of the adjective wymagający. The base adjective means “demanding” or “requiring,” and it is derived from the verb wymagać (to require, to demand). In proper Polish orthography, the form wymagającymi is used with masculine personal nouns in the instrumental case, as in Byli wymagającymi partnerami (They were demanding partners).
Grammatically, wymagający functions as a declined adjective or present participle. Its basic forms include wymagający (masculine
Usage and nuance: wymagać conveys imposing requirements or high standards, often with a neutral to slightly
See also: Polish grammar, adjectives and participles, declension of adjectives, instrumental case.