kolmekymppinen

Kolmekymppinen is a Finnish term used to describe a person who is thirty years old or belongs to the thirty-something age group. It functions both as an adjective, for example kolmekymppinen mies, and as a noun referring to a person, such as a kolmekymppinen.

The word is formed from kolmekymppi, a colloquial form for thirty, with the adjectival suffix -inen. Related forms include kolmekymppiset to denote the thirty-somethings as a group, and various inflected forms (kolmekymppisen, kolmekymppistä, kolmekymppisille, etc.) for different grammatical cases. The term is commonly used without a gender distinction when the noun is omitted, though it can be paired with kolmekymppinen nainen or kolmekymppinen mies to specify gender.

Usage and connotation: kolmekymppinen is informal and widely used in everyday speech, media, and advertising to reference age or life-stage without giving an exact age. It is neutral in tone, though more casual than formal alternatives. In formal writing one might use explicit age phrases instead, such as kolmekymmentä vuotta täyttävä henkilö, but kolmekymppinen remains common in colloquial Finnish.

See also: kolmekymppiset as the thirty-somethings, kaksikymppinen for twenty-somethings, nelikymppinen for those in their forties. The term is part of a broader pattern in Finnish of creating age-group descriptors by combining numerals with the -inen suffix.