This is the 1496th most frequent Catalan word.
negueruela
"Negueruela" does not appear to be a standard Catalan word. It may be a proper noun or a regional/local term.
In this sentence, 'negueruela' refers to a type of stone, used here as a descriptive material term.
L'edifici està construït amb pedra negueruela.
The building is constructed with negueruela stone.
Here 'negueruela' functions as an adjective describing bread, potentially indicating a style or origin named after a place.
El pa negueruela és típic de la regió.
Negueruela bread is typical of the region.
In this sentence, 'Negueruela' is used as a proper noun, presumably a surname.