ikääntyvällä
The Finnish word "ikääntyvällä" is the adessive case of the participle "ikääntyvä." This participle is derived from the verb "ikääntyä," which means to age or to grow old. Therefore, "ikääntyvällä" translates to "by aging," "in the process of aging," or "while aging." It describes a state or an action occurring during the aging process.
This grammatical form is used to indicate the circumstances or manner in which something happens as a