This is the 4087th most frequent Portuguese word.
pelas
"Pelas" is the contraction of "por" and "as," meaning "through the" or "by the" (feminine plural).
The word 'pelas' is used here as a contraction of 'por' and 'as', indicating movement through the plural feminine noun 'ruas', meaning 'streets'.
Eu passei pelas ruas antigas da cidade.
I walked through the old streets of the city.
Here, 'pelas' combines 'por' and 'as' to express the cause or reason supporting the plural feminine noun 'ideias', meaning 'ideas'.
Nós lutamos pelas nossas ideias.
We fight for our ideas.
In this sentence, 'pelas' is a combination of 'por' and 'as', denoting distribution or location across the plural feminine noun 'mesas', meaning 'tables'.