kerääntyessä

kerääntyessä is a Finnish word that functions as a temporal adverbial participle. It is the essive case of the third infinitive of the verb "kerääntyä," which means "to gather," "to accumulate," or "to assemble." Therefore, "kerääntyessä" translates to "while gathering," "as it gathers," or "in the process of gathering."

The word is used to describe an action or state that occurs concurrently with the act of gathering or accumulating. For example, one might say "Ihmiset olivat kerääntyessä paikalle," meaning "People were arriving/gathering at the location." It can also describe a process, such as "Lämpötila oli laskemassa kerääntyessä," which would translate to "The temperature was falling as it accumulated" (referring to something like snow or frost).

The grammatical structure involves the verb stem "keräänny-" plus the infinitive ending "-ä" and the essive case ending "-ssä." This form is common in Finnish for expressing simultaneous actions or states. The specific meaning often depends on the context of the sentence in which it is used, particularly the nature of what is gathering.