Ruoka on niin herkullista.

Breakdown of Ruoka on niin herkullista.

olla
to be
ruoka
food
herkullinen
delicious
niin
so

Questions & Answers about Ruoka on niin herkullista.

Why is the adjective herkullista in the partitive case here?
In Finnish, when you use the verb olla (to be) to describe an uncountable word like ruoka (food, also called a mass noun), the describing adjective must be in the partitive case. Since you cannot count food, the adjective takes the partitive ending.
How do we get herkullista from its basic dictionary form?
The basic dictionary word for delicious is herkullinen. A very common rule in Finnish is that words ending in -nen form their partitive by changing the -nen to -sta or -stä. Therefore, herkullinen becomes herkullista.
Since food is uncountable, why is ruoka in the basic nominative form instead of the partitive?
Even though ruoka is an uncountable mass noun, it is the subject of the sentence (the thing being described). In basic descriptive sentences with the verb olla (to be), the subject stays in the basic nominative case, while the adjective describing it takes the partitive.
Does the word niin (so) change its ending to match the adjective?
No, niin is an adverb used to make the adjective stronger. Adverbs do not take case endings or agree with the words around them, so it stays exactly as niin.

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