Valaistuista

Valaistuista is a Finnish word-form that appears as the elative plural of the adjective valaistu, meaning illuminated. It functions to indicate origin or source from illuminated items and is used when referring to more than one illuminated thing.

Etymology and morphology: The base is valaistu, the past participle form of the verb valaista "to illuminate." The elative plural suffix -ista/-istä is attached to the plural stem to yield valaistuista. The choice of ending depends on Finnish vowel harmony, with -ista typically used after back vowels and -istä after front vowels, as in valaistuista. The form is inflectional and commonly part of a noun phrase rather than a stand-alone noun.

Usage: Valaistuista is used to specify entities that originate from or come out of illuminated objects or spaces. It is most often paired with a following noun in the genitive or in construct phrases, for example, "valaistuista rakennuksista" meaning from the illuminated buildings, or "valaistuista tiloista" meaning from the illuminated spaces. The construction is standard in descriptive or spatial contexts and can appear in written or spoken Finnish, especially in descriptive passages.

Notes: This form is one of several Finnish inflected derivatives of valaistu. It illustrates how Finnish uses the elative plural to express source or origin and how adjectives in participle form adapt to case and number like other modifying elements in a noun phrase.

See also: Finnish grammar, elative case, -ista/-istä suffixes, past participles used as adjectives.