This is the 11484th most frequent Portuguese word.
oitavo
Eighth.
The word 'oitavo' is used here as an ordinal number to denote a position or rank, specifically the eighth floor of a building.
Eu moro no oitavo andar do prédio.
I live on the eighth floor of the building.
In this sentence, 'oitavo' continues as an ordinal number, representing the eighth day within a sequential count of days in a month.
Hoje é o oitavo dia de agosto.
Today is the eighth day of August.
Here, 'oitavo' is used to indicate ranking or order, in this case, the eighth position in a competition or event.