This is the 707th most frequent German word.
unsere
"Unsere" means "our" in English.
"Unsere" is used as the possessive adjective matching "Katze" (feminine singular noun).
Unsere Katze schläft auf dem Sofa.
Our cat is sleeping on the sofa.
"Unsere" is used here with "Großeltern" (plural noun) as the possessive adjective.
Wir besuchen unsere Großeltern am Wochenende.
We are visiting our grandparents on the weekend.
In this example, "unsere" describes "Arbeit" (feminine singular noun).