Sähköistyneen
Sähköistyneen is the genitive singular form of the Finnish word "sähköistynyt." "Sähköistynyt" is the past participle of the verb "sähköistyä," which means to become electrified, to be electrified, or to be modernized with electricity. Therefore, "sähköistyneen" translates to "of the electrified" or "belonging to the one that has become electrified."
In a sentence, "sähköistyneen" would refer to something that has undergone the process of electrification. For