This is the 1883rd most frequent German word.
unser
"Unser" means "our" in English.
Possessive pronoun 'unser' agrees with singular, neuter noun 'Auto'.
Unser Auto ist rot.
Our car is red.
Possessive pronoun 'unsere' agrees with singular, feminine noun 'Tante'.
Wir besuchen unsere Tante.
We are visiting our aunt.
Possessive pronoun 'unsere' agrees with plural noun 'Freunde'.