tekijänsä
Tekijänsä is a Finnish grammatical form derived from tekijä, meaning “creator” or “author,” combined with the third-person possessive suffix -nsä (often written as -sä after certain vowels). The result means roughly “his/her/its author” and is used to indicate that someone is the owner or originator of a creation in relation to another noun or clause. The exact possessor (he/she/they) is determined by context, and tekijänsä does not itself specify gender or number beyond what the sentence conveys.
In usage, tekijänsä typically appears in noun phrases that express possession in relation to another noun.
Notes on function and form: Finnish possessive suffixes attach to the possessed noun, so the possessive relationship