Sähköisillä

Sähköisillä is the plural adessive form of the Finnish adjective sähköinen, meaning electric or electrical. In Finnish grammar, adjectives agree with the nouns they modify in number and case, and the plural adessive ending is -illä. Thus, sähköisillä modifies a plural noun in the adessive case, and is typically translated as “with electrical X” or “on electrical X” depending on the context.

The form is commonly used in technical and everyday language to describe items or concepts related to electricity. Examples include “sähköisillä laitteilla” (with electrical devices), “sähköisillä verkoilla” (on electrical networks), and “sähköisillä järjestelmillä” (with electrical systems). The plural adessive form contrasts with the singular “sähköisellä” (on/with an electrical item) and with the nominative plural “sähköiset” (electrical, in the basic plural form).

Etymology: the root “sähkö” denotes electricity, and the suffix “-inen” forms adjectives. The combination yields the adjective sähköinen and its inflected forms, including sähköisillä across different cases and numbers.

See also: electricity in Finnish (sähkö), Finnish grammar, adjectives.