This is the 875th most frequent Latvian word.
vecāku
The Latvian word "vecāku" means "parents'" (possessive form).
In this sentence, 'vecāku' is used as a genitive plural noun meaning 'of parents', indicating possession.
Mēs devāmies uz vecāku sapulci vakar.
We went to the parents' meeting yesterday.
Here, 'vecāku' again functions as a genitive plural noun, associating the shelf specifically with the parents.
Es aizņēmos grāmatu no vecāku plaukta.
I borrowed a book from the parents' shelf.
In this sentence, 'vecāku' describes the ownership of something in relation to 'neighbor' as a qualifier (parent's neighbor).