vuoristoisen

Vuoristoisen is the genitive singular form of the Finnish adjective vuoristoinen, which means mountainous or pertaining to mountains. It is used to describe a noun in a genitive construction, typically to express possession or association with a mountainous region. For example, vuoristoisen maan ilmasto means “the climate of the mountainous land.”

Vuoristoinen is formed from vuoristo (mountain range) with the attributive suffix -inen, which is common in Finnish for creating adjectives. Like other -inen adjectives, vuoristoinen declines for case and number, and vuoristoisen is its genitive singular form. In other grammatical cases the adjective appears in other inflected forms, such as inessive or translative, following standard Finnish agreement rules.

In usage, vuoristoisen is often found in geographic or descriptive contexts. Examples include phrases describing landscapes, climates, or regions associated with mountains, such as vuoristoisen maan maisema (“the landscape of the mountainous country”) or vuoristoisen alueen teiden verkosto (“the road network of the mountainous region”). The form helps convey a sense of belonging or relation to mountains within a noun phrase.

See also: vuoristo, the base noun meaning a mountain range; vuoristoisuus (mountainousness), the corresponding noun form; and vuoristoisena or other inflected forms that illustrate how vuoristoinen is declined in different cases.