This is the 14951st most frequent German word.
sauer
"Sauer" means "sour" or "angry" in English.
In this sentence, 'sauer' describes the taste of the juice, indicating it is acidic or sour.
Der Saft schmeckt sauer.
The juice tastes sour.
Here, 'sauer' is used in a figurative sense to describe someone's emotional state, indicating they are annoyed or upset.
Er ist sauer, weil ich zu spät gekommen bin.
He is upset because I arrived late.
In this instance, 'sauer' describes the preparation method of the vegetables, which involves pickling, imparting a sour taste.