terveellisiin
Terveellisiin is the illative plural form of the Finnish adjective terveellinen, used when the noun it modifies is plural and in the illative case (into, toward). In Finnish, adjectives agree with the nouns they describe, so terveellisiin appears with plural nouns in illative form, for example terveellisiin elämäntapoihin or terveellisiin ruokavalioihin.
Usage of terveellisiin commonly occurs in health, nutrition, and lifestyle discourse to express adoption or movement
Notes on morphology and related forms: terveellisiin is a specific inflected form of the adjective; other forms
In summary, terveellisiin is a grammatical form used to describe or indicate movement toward healthy options