15vuotiaiden

15vuotiaiden is the genitive plural form of the Finnish expression 15-vuotias, meaning a person who is fifteen years old. The term designates a group defined by age and is used in contexts where the attributes, rights, or actions of this group are discussed. In standard Finnish, the nominative plural is 15-vuotiaat, and the genitive plural is 15-vuotiaiden; the form without the hyphen, 15vuotiaiden, appears mainly in plain text or where diacritics and hyphens are omitted, but it is not the conventional orthography.

Usage of 15-vuotiaiden occurs in policy documents, statistics, education and youth research, and other contexts that examine matters related to fifteen-year-olds as a demographic group. Examples include phrases such as 15-vuotiaiden koulutukseen liittyvät haasteet (challenges related to fifteen-year-olds’ education) or tutkimus 15-vuotiaiden hyvinvoinnista (a study on the well-being of fifteen-year-olds). The genitive plural signals possession, relation, or association with the group, as in päätökset 15-vuotiaiden osallisuudesta (decisions about the involvement of fifteen-year-olds).

Grammatical note: Finnish forms with vuotias describe age. 15-vuotias is the singular form; 15-vuotiaat is the nominative plural; 15-vuotiaiden is the genitive plural. The unhyphenated variant 15vuotiaiden is seen less formally and is not the standard spelling in most published Finnish, where 15-vuotiaiden is preferred.