This is the 3574th most frequent Portuguese word.
quartas
"Quartas" translates to "Wednesdays" or refers to "quarters" depending on context.
The word 'quartas' refers to 'quartas-feiras', which means 'Wednesdays', the day of the week.
Gosto de jogar futebol às quartas.
I like to play soccer on Wednesdays.
Here 'quartas' refers to 'quartas de final', indicating the quarter-final stage in a sports competition.
Eles organizam o evento nas quartas de final.
They organize the event during the quarter-finals.
In this sentence, 'quartas' is shorthand for 'quartas-feiras', once again referencing Wednesdays as days of accommodation or scheduling.