pitkäkestoisista

Pitkäkestoisista is a Finnish grammatical form used to indicate long duration in the elative plural. It is the elative plural form of the adjective phrase pitkäkestoiset, which means long-lasting or lasting a long time. In Finnish, adjectives agree with the nouns they modify, and the case endings reflect their syntactic role. When the noun is in the elative plural, the corresponding adjective takes the ending -is-ta, producing pitkäkestoisista.

Usage of this form appears primarily in formal or technical Finnish, such as academic writing, policy discussions, or scientific reporting, where speakers refer to effects, phenomena, or conditions that are long-lasting. It answers questions related to origin or focus of discussion, such as “concerning the long-lasting …” or “from the long-lasting ….”

Examples:

- Pitkäkestoisista vaikutuksista on raportoitu useissa tutkimuksissa. (There have been reports about the long-lasting effects in several studies.)

- Keskustelua käytiin pitkäkestoisista vaikutuksista, joita hoitomuutokset voivat aiheuttaa. (The discussion focused on the long-lasting effects that treatment changes may cause.)

Notes:

- pitkäkestoisista is a specific case form (elative plural) and is therefore more typical in written or formal Finnish; in everyday speech speakers may use other forms such as pitkäkestoiset or pitkäaikaiset depending on the context.

- Related forms include pitkäkestoiset (nominative plural) and pitkäkestoisten (genitive plural). See also nearby terms like pitkäkestoisuus and pitkäkestoinen for related concepts of duration and endurance.