This is the 11206th most frequent Portuguese word.
marginal
"Marginal" in Portuguese means "relating to or situated at the edge or margin; also can mean a criminal or socially excluded person."
In this sentence, 'marginal' is used as an adjective to mean 'alongside or adjacent to a margin, specifically referring to proximity to a river.'
A estrada marginal ao rio estava congestionada.
The road alongside the river was congested.
Here, 'marginal' refers to something of minor or limited importance, indicating a small difference in the results.
Há uma diferença marginal nos resultados do experimento.
There is a marginal difference in the experiment's results.
In this case, 'marginal' is used as a noun to refer to a person living on the margins of society, conveying social exclusion or outlaw status.