This is the 6089th most frequent Portuguese word.
carter
"Cárter" in Portuguese refers to the "oil pan" or "crankcase" in a vehicle's engine.
Here, 'carteiro' refers to a person who delivers mail, derived from 'carta' (letter).
O carteiro entregou uma encomenda cedo hoje.
The mailman delivered a package early today.
In this sentence, 'carter' might be used creatively or figuratively to mean a storage space, derived from similarities with 'carta' (letter).
Ela guarda suas cartas importantes no carter.
She keeps her important letters in the wallet.
Here, 'carter' refers to a mechanical part, common in technical language.