psykoottisten
Psykoottisten is the genitive plural form of the Finnish adjective psykoottinen, which describes something related to psychosis, a severe mental disorder affecting perception and thought. In Finnish grammar, adjectives agree with the noun they modify in number and case, and the genitive plural form of the adjective often ends in -isten. Therefore, psykoottisten is used when the described noun is in genitive plural, or when the adjective itself appears in a genitive plural construction.
Morphology and usage. The base form is psykoottinen (psychotic, psychosis-related). To form the genitive plural, the
Context and nuances. Psykoottinen primarily denotes relation to psychosis rather than to general “psychotropic” or “psychoactive”
See also. psykoosi, psykoottiset (plural nominative), psykoottinen.