ensimäistä
Ensimmäistä is a Finnish word. It is the partitive singular form of the word "ensimmäinen," which means "first" or "firstly." In Finnish grammar, the partitive case is used to indicate an indefinite object, a part of a whole, or in situations where something is being done for the first time. Therefore, "ensimmäistä" specifically refers to the first instance of something in a grammatical context where the partitive is required.
For example, one might say "Mä tein sen ensimmäistä kertaa" which translates to "I did it for