This is the 1377th most frequent Portuguese word.
máxima
"Máxima" means "maximum" or "motto" in English, depending on context.
Here, 'máxima' is used as an adjective to describe 'velocidade' (speed) in the sense of the highest level permitted. It specifies the limit in terms of measurable quantity.
A velocidade máxima permitida nesta estrada é de 80 km/h.
The maximum allowed speed on this road is 80 km/h.
In this sentence, 'máxima' is used as a noun derived from Latin, meaning a principle or rule that guides someone's behavior or philosophy.
Ela sempre segue sua máxima de viver cada dia como se fosse o último.
She always follows her maxim of living each day as if it were the last.
Here, 'máxima' acts as an adjective qualifying 'concentração' (concentration), indicating the highest degree or intensity possible in this context.