ensimmäisessä
Ensimmäisessä is a Finnish inessive singular form of the ordinal adjective ensimmäinen, meaning “the first.” It is used to indicate location or situation involving the first item or position, and it appears when the noun it modifies is in the inessive case (in, inside, or within the first [something]).
In ordinary usage, ensimmäisessä is paired with a noun in the inessive case to specify what is
Grammatically, ensimmäinen behaves like other adjectives ending in -inen and inflects to match the noun it
Related terms include ensimmäinen (the base ordinal meaning “first”) and other ordinals such as toinen (second)