This is the 6063rd most frequent Russian word.
соуса
"Соуса" is the genitive singular or nominative plural form of "соус," meaning "sauce" in English.
In this sentence, 'соуса' is in the genitive case to express a partitive sense, indicating 'some of the sauce'.
Я добавил немного соуса в пасту.
I added some sauce to the pasta.
Here, 'соуса' is in the genitive case to complement the quantitative expression 'много' (too much).
В этом супе слишком много соуса.
This soup has too much sauce in it.
In this example, 'соуса' is in the genitive case because 'два' (two) requires genitive singular for countable nouns.