kuukausittaista

Kuukausittaista is a Finnish linguistic form that represents the partitive singular of kuukausittainen, the adjective meaning monthly. In Finnish, kuukausittainen describes something that occurs or is done every month. When used with a noun in the partitive case, the form kuukausittaista appears, indicating an indefinite quantity or abstraction of monthly nature. Consequently, kuukausittaista is not a standalone noun but a grammatical inflection used in phrases such as kuukausittaista raportointia (monthly reporting) or kuukausittaista laskutusta (monthly invoicing).

Origins and morphology: The base comes from kuukausi, meaning "month," plus the suffix -ttainen, which yields kuukausittainen, “monthly.” The inflection follows standard Finnish adjective declension: singular nominative kuukausittainen, partitive kuukausittaista, genitive kuukausittaisen; plural forms include kuukausittaiset (nominative) and kuukausittaisia (partitive). The same stem adapts to various case and number requirements in a sentence.

Usage notes: Kuukausittaista is common in formal or semi-formal Finnish, especially in business, statistics, and public administration. It is typically paired with nouns in the partitive case to express a recurring monthly nature, for example kuukausittaista dataa, kuukausittaista tilastointia, or kuukausittaista maksua. When the context requires a definite monthly reference or plural items, other forms of the adjective or related words may be used (such as kuukausittaiset or kuukausittain).

See also: kuukausittainen (the base adjective meaning “monthly”), kuukausittain (adverb meaning “monthly” or “on a monthly basis”), kuukausittaisuus (the property of occurring monthly).