nieregularnym

Nieregularnym is the instrumental singular masculine and neuter form of the Polish adjective nieregularny, meaning irregular or non-standard. The adjective describes nouns that do not conform to standard rules, patterns, or norms. Like other Polish adjectives, nieregularny declines for gender, number, and case, and nieregularnym is the form used in instrumental singular for masculine and neuter nouns.

Morphology and usage: The base forms are nieregularny (m. sg), nieregularna (f. sg), and nieregularne (n. sg). In instrumental singular, the forms are nieregularnym for masculine and neuter, and nieregularną for feminine. The plural instrumental form is nieregularnymi. Thus nieregularnym is used before masculine or neuter nouns in the instrumental case, for example before a predicative noun after certain verbs or after prepositions that require instrumental.

Usage notes: The word is common in formal, technical, or descriptive writing to indicate an irregular feature, such as an irregular procedure, pattern, or behavior. In everyday speech, speakers more often use nieregularny to describe a noun in the nominative or other cases, while nieregularnym appears in constructions that require the instrumental.

Example: To było nieregularnym zabiegiem. (That was an irregular procedure.)

See also: nieregularność, nieregularny in its base forms, and Polish adjective declension.