tietyistä

Tietyistä is a Finnish inflected form of the adjective tietty, meaning "certain" or "particular." It is used when the adjective modifies a plural noun and the phrase needs the genitive case. In everyday language it appears most often in clauses that specify a subset of something, rather than the whole group. For example, in phrases such as tietyistä syistä (for certain reasons), tietyistä ihmisistä (from certain people) or tietyistä asioista (about certain matters). In these uses tietyistä signals that only a defined, though not necessarily specified, portion is being referred to.

Grammatical note: tietty is a standard Finnish adjective, and tietyistä reflects the regular inflection pattern for adjectives in the plural genitive form. The corresponding nominative plural form is tietyt, while other cases change the ending according to Finnish grammar. The key point is that tietyistä agrees with a plural noun in both number and case, indicating a restricted subset within a larger group.

Usage and nuance: tietyistä conveys a sense of limitation or specificity without naming the exact items or individuals. It can carry a neutral, informative tone or, depending on context, a slightly evaluative one, especially when contrasting with other groups or the whole category. It is common in written Finnish, journalism, and formal discourse, but also appears in everyday speech when a speaker wants to indicate a subset rather than the entire set.

See also: tietty (the base adjective meaning "certain"), tietyt (nominative plural form), other Finnish adjectives with similar genitive plural forms.