koulussaan

Koulussaan is a Finnish grammatical construction meaning “in his/her school” or “at his/her school.” It is formed by combining the inessive form of koulu, koulussa, with the third-person possessive suffix -nsa/-nsä, producing a fused form that indicates whose school is being referred to. The construction is common in written and spoken Finnish and is used to locate a subject within their own educational environment.

Formation and usage notes: The base is koulu (school). The inessive case -ssa yields koulussa, meaning “in the school.” The standard third-person possessive suffix -nsa/-nsä attaches to the noun phrase, and the result is merged with the inessive form to form koulussaan. The exact suffix choice depends on Finnish orthography and vowel harmony. The phrase emphasizes ownership or belonging of the place to the subject, rather than merely describing a location.

Function and nuance: Koulussaan foregrounds the subject’s personal relationship to the school, often in narrative or descriptive contexts. It can imply a sense of belonging, authority, or routine tied to the subject’s own educational setting. In contrast, generic locatives without a possessive suffix would use koulussa (in the school) without indicating ownership.

Examples:

- Hän jäi koulussaan pitkään, ennen kuin lähti kotiin. (He stayed at his school for a long time before going home.)

- Koulussaan oppilaat saivat tukea opettajiltaan. (In their school, the students received support from their teachers.)

See also: Finnish grammar, inessive case, possessive suffix.