Periodickou

Periodickou is a grammatical form rather than a standalone lexical item. In Czech, it is the feminine singular accusative form, and also the feminine singular instrumental form, of the adjective periodický, which means “periodic” or “periodical.” The base form periodický changes its ending to agree with the noun it modifies in gender, number, and case; for feminine nouns in the accusative or instrumental, the form periodickou is used.

In practical use, periodickou modifies feminine nouns such as tiskovina (publication) or změna (change). Examples include periodickou tiskovinou (with a periodical publication, instrumental) and vidět periodickou tiskovinu (to see a periodical publication, accusative). These forms are part of standard Czech declension patterns and may appear in journalism, bibliographic descriptions, or linguistic explanations that discuss periodické publikace or related concepts.

Cross-linguistically, Czech and Slovak share similar inflectional patterns for adjectives. In Slovak, the corresponding feminine accusative form is periodickú. The root period- derives from Latin or Greek sources related to intervals of time or recurrence, and the adjective periodický covers meanings ranging from “occurring at regular intervals” to “published at regular intervals.”

Because periodickou is an inflected form, it does not appear in dictionaries as a separate entry; its meaning is the same as the base adjective periodický when used with a feminine noun in the relevant case. See also: periodický.