Kosteista

Kosteista is a Finnish inflected form of the adjective kostea, which means damp or moist. It is the plural elative form, used with plural nouns to indicate origin or source, as in the phrase kosteista tiloista, meaning from damp rooms. The elative case, marked by the suffix -sta/-stä, expresses movement from or out of a place, and it agrees with the noun in number (plural) and case.

In typical usage, kosteista appears in descriptive and technical contexts dealing with moisture, humidity, or damp conditions. It can modify plural nouns such as tilat (rooms), seinät (walls), or olosuhteet (conditions). For example, kosteista tiloista kannattaa tehdä tarkastuksia, or “From damp rooms, inspections are advisable.” Other common phrases include kosteista seinistä or kosteista olosuhteista, all conveying moisture-related origin or source.

Relation to other forms: kosteista is part of a system where kostea serves as the positive adjective, and various suffixes (such as -sta/-stä for elative) produce different grammatical forms to match the noun they describe. The base adjective kostea also forms related expressions like kostea ilma (moist air) or kostea maa (moist soil), with appropriate inflection to fit singular or plural nouns and their cases.

See also: kostea, kosteus, elatiivi (elative case), kostea ilma, kosteat tilat.