This is the 11423rd most frequent Portuguese word.
nostalgia
A sentimental longing or wistful affection for the past.
The word 'nostalgia' is used here to describe a profound emotional feeling evoked by memories of past experiences.
Experiencio uma profunda nostalgia ao lembrar de minha infância na casa de meus avós.
I experience deep nostalgia when I remember my childhood at my grandparents' house.
In this instance, 'nostalgia' signifies a specific yearning or fondness for an aspect of the past, illustrated by the reference to 80s music.
A nostalgia por músicas dos anos 80 me faz querer reviver essa era.
Nostalgia for 80s music makes me want to relive that era.
Here, 'nostalgia' is depicted as a visible emotional state, recognizable to others, showing its impact on someone's demeanor.