sisäisiksi

Sisäisiksi is a Finnish grammatical form, specifically the plural translative form of the adjective sisäinen, meaning internal or inner. It is used to express a change of state into something internal, and it appears after verbs of becoming, such as tulla or muuttua, with a plural subject.

Morphology and usage: In Finnish, adjectives agree with the noun they modify in number and case. The singular translative form is sisäiseksi, and the plural translative form is sisäisiksi. Thus, sisäisiksi denotes “becoming internal/inner” when the subject is plural. The construction typically uses a verb of change, for example muodostaen predicatives with plural subjects.

Usage notes: The translative case marks a change of state or transformation. The plural form sisäisiksi is relatively specialized and more common in written, formal, or academic Finnish, such as linguistic or psychological discussions. In everyday speech, speakers may opt for simpler or more context-appropriate phrases, or use the singular sisäiseksi if the subject is singular.

Examples:

- Näkemykset muuttuivat sisäisiksi. (The views became internal/inner.)

- Tutkijat kuvasivat kulttuurillista muutosprosessia, jossa käytännöt muuttuivat sisäisiksi. (Researchers described the cultural change process in which practices became internal.)

See also:

- Finnish grammar: translative case

- Adjective inflection in Finnish

- Change-of-state constructions in Finnish

Notes: While sisäisiksi has a clear grammatical role, its usage is most natural in contexts discussing transformation into a state described by the adjective sisäinen, rather than in colloquial everyday talk.