päevakaudseid

Päevakaudseid is an Estonian grammatical form derived from the adjective päevakaudne, meaning diurnal or daytime-related. The word functions as an inflected plural form used with nouns in non-nominative cases, typically the partitive or genitive, in accordance with Estonian adjective inflection rules. It is commonly encountered in academic, meteorological, and ecological writing where daytime characteristics are described.

In use, päevakaudseid describes phenomena, conditions, or characteristics that occur during the day and are treated as plural in the sentence. It often appears with nouns in the partitive or genitive case, such as when the sentence structure requires a non-nominative form or after certain quantifiers.

Examples:

- Päevakaudseid tingimusi tuleb arvestada välitööde korral. (Diurnal conditions must be taken into account when planning fieldwork.)

- Päevakaudseid nähtusi täheldati suvekuudel. (Diurnal phenomena were observed during the summer months.)

Relation to other forms: Päevakaudseid is part of the set of inflectedPlural forms of päevakaudne, which also includes päevakaudsed (nominative plural) and päevakaudsete (genitive plural). Estonian adjectives agree with the noun in number and case, so the exact form changes with the grammatical role of the noun in the sentence. The form päevakaudseid is thus one of several plural endings used to express daytime-related attributes in different syntactic contexts.