This is the 423rd most frequent Spanish word.
nuestras
"Nuestros" is the plural form of "our" used when referring to feminine nouns.
The word 'nuestras' functions as a possessive adjective modifying the noun 'ideas', indicating ownership by a group that includes the speaker.
Nuestras ideas siempre son bienvenidas en el grupo.
Our ideas are always welcome in the group.
Here, 'nuestras' describes the backpacks as being owned or used by the group including the speaker.
Llevamos nuestras mochilas al colegio todos los días.
We carry our backpacks to school every day.
In this sentence, 'nuestras' refers to the promises made by a group that includes the speaker, emphasizing collective ownership or responsibility.