This is the 6875th most frequent French word.
little
The French equivalent of "little" is "petit," meaning small or tiny.
Here, 'petit' is used as an adjective to describe 'frère', indicating youth or a family relationship.
Mon petit frère adore jouer aux jeux vidéo.
My little brother loves playing video games.
In this context, 'peu de' functions as a phrase meaning 'a little' or 'some', showing a limited amount or quantity.
J'ai un peu de temps libre cet après-midi.
I have a little free time this afternoon.
'Un peu' is utilized here as a modifier meaning 'a little', expressing degrees or extents.