laillisiin

Laillisiin is a Finnish illative plural form of the adjective laillinen, meaning "legal" or "lawful." In Finnish grammar, adjectives decline like nouns for case and number, and the illative plural suffix is -iin, yielding laillisiin. The form is primarily used when the noun to which the adjective refers is understood from context or when the phrase denotes movement toward or inclusion in a group described as legal or legitimate.

Semantically, laillisiin can function to express "to the lawful ones" or "into the legitimate ones," depending on the surrounding verb and sentence structure. Because it is a specific inflected form, laillisiin is most often encountered in formal, legal, or linguistic contexts rather than in everyday speech where the noun is explicit.

In general usage, the same semantic space is occupied by other illative forms of adjectives to indicate direction or inclusion, and laillisiin is one example of Finnish noun-like adjective inflection. The basic forms related to laillinen include laillinen (nominative singular), laillisen (genitive), laillista (partitive), laillisiin (illative plural). See also laillinen, laillistaa, and Finnish grammar discussions on the illatiivi.