lisääytyvät

Lisäytyvät is the present tense, third-person plural form of the Finnish verb lisäytyä. It conveys that something increases or becomes added, typically describing growth in numbers, quantities, or elements that accumulate. In use, lisäytyvät refers to multiple subjects undergoing the process of increasing, rather than a single item.

Morphology and meaning: Lisäytyä is an intransitive verb meaning to increase or to become added. The suffix -yty- marks a verbal root related to becoming or coming into being, and the -vät ending signals third-person plural present. Related forms include lisäytyminen (the process of increasing), lisäytynyt (increased, perfect participle), and the noun lisäys (an addition). The form lisätyä is a past participle related to the passive notion of being added in some contexts, but lisäytyvät specifically is active in meaning: they increase.

Usage: The form is common in scientific, statistical, and descriptive writing when multiple items or factors are increasing. It is often found with plural subjects such as groups, measurements, or variables. It should be contrasted with passive constructions like lisätään, which expresses “is added” in a more impersonal sense, or with singular forms such as lisäytyy when referring to a single subject.

Examples:

- Kustannukset ja verot lisäytyvät monissa maissa talouskasvun seurauksena.

- Väestön määrä lisäytyvät useilla alueilla nopeasti, mikä heijastuu palvelutarpeeseen.

See also: lisäytyminen, lisäys, lisätä (root verb for adding).