puolisoita
Puolisoita is the partitive plural form of the Finnish noun puoliso, meaning spouse or partner. Puoliso refers to a person’s husband or wife, and can also denote a partner in a registered or legal partnership. The form puolisoita functions as the object of a sentence when the quantity is indefinite or when the action requires the partitive case.
In Finnish grammar, the partitive plural arises in various contexts, such as with negation, with expressions
The base term is puoliso, and related terms include aviopuoliso (formal or legal term for a spouse)
Overall, puolisoita is a niche grammatical form used to refer to multiple spouses in the partitive plural,