Sulkeutuneissa
Sulkeutuneissa is a Finnish grammatical form that functions as a participial adjective in the inessive plural. It is derived from the verb sulkeutua and is used to describe locations or environments that are closed off or sealed. The form literally conveys “in the closed ones,” and it typically accompanies nouns in the inessive plural (for example, tiloissa, rooms or spaces).
The base stem is sulkeutune-, to which the plural inessive suffix -issa (paired with the plural noun)
Kokeet suoritettiin sulkeutuneissa tiloissa. The experiments were carried out in closed rooms. Tutkimus tapahtui sulkeutuneissa ympäristöissä,
Sulkeutuneissa is part of a set of related forms derived from sulkeutua, including sulkeutuva, sulkeutunut, and
Finnish grammar, inessive case, participial adjectives, sulkeutua.