pidennetyssä
The Finnish word "pidennetyssä" is the inessive plural form of the adjective "pidennetty." "Pidennetty" translates to "extended," "prolonged," or "lengthened" in English. Therefore, "pidennetyssä" essentially means "in the extended," "in the prolonged," or "in the lengthened" state, when referring to multiple instances or a plural subject.
The usage of "pidennetyssä" depends heavily on the context of the sentence. For example, it could refer