This is the 2645th most frequent Portuguese word.
mensais
"Mensais" means "monthly" in English.
In this sentence, 'mensais' is used as an adjective describing 'despesas' (expenses), indicating they occur every month.
As despesas mensais devem ser planejadas com cuidado.
Monthly expenses should be carefully planned.
Here, 'mensais' serves as an adjective for 'relatórios' (reports), specifying that such reports are produced monthly.
Somos responsáveis por relatórios mensais de desempenho.
We are responsible for monthly performance reports.
In this case, 'mensais' modifies 'encontros' (meetings), suggesting these meetings take place once per month.