This is the 2508th most frequent Catalan word.
veïna
Neighbor (feminine).
In this context, 'veïna' refers to a female neighbor—someone who lives nearby.
La meva veïna sempre m'ajuda a cuidar les plantes.
My neighbor always helps me take care of the plants.
Here, 'veïna' again indicates a female neighbor but emphasizes her quality as being a 'best' or favored neighbor.
He anat al parc amb la meva millor veïna.
I went to the park with my best neighbor.
In this sentence, 'veïna' refers to a female who has recently moved close to the location of the speaker.