käsittelemiensä

Käsittelemänsä is a Finnish word that functions as a past active participle. It is derived from the verb "käsitellä," which means to handle, to process, to deal with, or to treat. The suffix "-mänsä" indicates a possessive relationship, typically referring to the subject of the clause. Therefore, "käsittelemänsä" literally translates to something like "that which it/he/she has handled/processed/dealt with/treated."

In practice, "käsittelemänsä" is used to describe something that has been the object of an action performed by a preceding subject. For example, in the sentence "Hän tutki käsittelemänsä asiakirjan," "käsittelemänsä" modifies "asiakirjan" (document). The sentence translates to "He examined the document that he had handled/processed." The "-nsä" ending signifies that the subject performing the handling is the same subject performing the examining (Hän/He).

The word can also refer to abstract concepts or ideas. If someone were to say "Hän analysoi käsittelemänsä teorian," it would mean "He analyzed the theory that he had dealt with/considered." The grammatical function is to connect a past action of handling or processing with its object, emphasizing the subject's involvement with that object. It highlights that the subject has actively engaged with the thing being discussed.