Epäionisiin
Epäionisiin is a Finnish adjective form built from the prefix epä- meaning not or un-, and the suffix -inen. The base adjective epäioninen carries the sense of unbecoming, improper, or indecorous. In standard Finnish, adjectives decline to agree with the nouns they modify, so epäioninen appears in various inflected forms such as epäioniset (nominative plural) or epäioninen (singular). The form epäionisiin is the illative plural, used when the adjective modifies a plural noun in a clause meaning “to unbecoming acts” or “toward unbecoming things.”
In practice, epäionisiin is most often encountered as part of phrases describing conduct or actions that do
Usage notes include that epäioninen functions like a regular Finnish adjective, so it appears with the noun
See also: Finnish prefix epä-, the adjective suffix -inen, and Finnish adjective inflection patterns.