This is the 3798th most frequent Portuguese word.
cptm
"CPTM" is an acronym for "Companhia Paulista de Trens Metropolitanos," meaning "São Paulo Metropolitan Train Company" in English.
In this sentence, 'CPTM' refers to the public metropolitan railway system used for commuting.
Eu sempre pego a CPTM para ir ao trabalho.
I always take the CPTM to go to work.
Here, 'CPTM' is used to denote the railway system, emphasizing its service performance.
Hoje a linha da CPTM está mais rápida devido às melhorias.
Today the CPTM line is faster due to improvements.
In this context, 'CPTM' specifies the rail station belonging to the railway network.