päiviä

Päiviä is the plural partitive form of the Finnish noun päivä, meaning "days." In Finnish grammar the partitive case is used for indefinite quantities, partial objects, or actions that affect something without defining an exact amount. Therefore päiviä expresses "days" in a non-specific or ongoing sense, as in phrases that indicate an undetermined number of days.

Common usages include expressions with indefinite quantities, such as useita päiviä (several days) or monia päiviä (many days). It also appears after numerals that express approximate quantities, for example Olen ollut siellä useita päiviä (I have been there for several days) and Olen matkustanut kymmeniä päiviä (I have traveled for dozens of days). When a precise count is given with a specific numeral, Finns typically use the partitive singular form, as in kolme päivää or kaksi päivää.

In addition to its grammatical role, päivä meaning "day" also has broader semantics in Finnish. It can refer to a calendar day, a 24-hour period, or to the daylight portion of the day in context; it features in many compounds such as päiväkirja (diary) and päiväunia (daytime naps), illustrating its versatility in everyday language.

Related forms include päivät, the nominative plural used when the days are the subject of a sentence; päivien, the genitive plural; and päivä, the singular nominative. The form päiviä is therefore specifically the partitive plural, used to denote an indefinite or partial set of days and in various expressions of quantity.