elektrisiin
Elektrisiin is a Finnish inflected form of the adjective elektrinen, meaning electrical. It is used to modify plural nouns in the illative case, often conveying the sense of movement toward or into something electrical. For example, elektrisiin järjestelmiin means “into electrical systems,” and elektrisiin laitteisiin means “into electrical devices.” As with other Finnish adjectives, elektrisiin agrees with the noun it modifies in number and case.
In contemporary Finnish, elektrinen is a loanword in many technical contexts, while sähköinen is more common
Etymology traces elektrinen to the Swedish word elektrisk (electrical), which in turn derives from Latin electricus
See also: elektrinen, sähköinen, Finnish grammar, illative case, Finnish adjectives.