rekisterinsä

Rekisterinsä is a Finnish possessive form derived from rekisteri, meaning a register or registry. It translates to "his/her/its register" or "their register" in English, depending on the possessor. As a form, it is not a concept on its own but a grammatical construction used to indicate ownership of a register.

Formation and usage: In Finnish, possessive suffixes attach to the possessed noun. The third-person possessive suffix -nsä (often written as -nsä) expresses ownership by he, she, it, or they, depending on context. When combined with rekisteri, the form is rekisterinsä. The same base can take different possessive forms to match the possessor in a sentence, such as its, his, her, or their register.

Usage notes: The phrase commonly appears in legal, administrative, or data-keeping contexts where one refers to a specific register owned by a person or organization. Because Finnish relies on context to determine the exact possessor, rekisterinsä can mean "his register," "her register," "its register," or "their register" as appropriate.

Examples:

- Käyttäjä päivitti rekisterinsä. (The user updated their register.)

- Yritys pitää rekisterinsä ajan tasalla. (The company keeps its register up to date.)

In both examples, rekisterinsä denotes ownership of the register by the subject of the sentence.