yöllisen

Yöllinen is a Finnish adjective meaning “of the night,” “nocturnal,” or “nightly.” It describes things related to or occurring during the night. The word is formed from the noun yö (night) with the adjectival suffix -llinen and follows the typical inflection pattern of -inen adjectives.

Grammatical forms and usage notes:

- Nominative singular: yöllinen

- Genitive singular: yöllisen

- Partitive singular: yöllistä

- Nominative plural: yölliset

- Genitive plural: yöllisten

- Partitive plural: yöllisiä

These forms allow yöllinen to modify nouns in various cases and numbers, such as yölliset äänet (nocturnal sounds) or yöllisen kaupungin valot (the lights of the nocturnal city).

Usage in language:

Yöllinen is commonly used to describe events, phenomena, or creatures that occur at night, for example yöllinen festivaali (a nighttime festival) or yölliset eläimet (nocturnal animals). In everyday language, speakers sometimes prefer compound expressions with yö- or yö-, but yöllinen remains a standard literary or precise descriptor for nocturnal characteristics.

Etymology:

The term derives from yö (night) with the adjectival suffix -llinen, a productive formation in Finnish that yields adjectives meaning “having the qualities of” the base noun.

See also:

Yö, nocturnal, night, nocturnal phenomena.