Voimakkailla
Voimakkailla is a Finnish word form that functions as the plural adessive form of the adjective voimakas, meaning strong or powerful. In Finnish, adjectives agree with the nouns they modify in number and case, so the corresponding plural adessive ending is -illa/-illä. Therefore voimakas becomes voimakkailla when describing multiple nouns in the adessive case.
The adessive case in Finnish generally conveys location or accompaniment, roughly translating to “on/at” or “with”
Usage notes: Voimakkailla is almost always part of a larger noun phrase and is not typically used
Etymology and related forms: Voimakkailla derives from the root voima (power) and the suffixes that form the
See also: Finnish grammar, adjectives in Finnish, adessive case.