This is the 733rd most frequent Portuguese word.
comercial
"Comercial" in Portuguese means "commercial" in English, relating to trade, business, or advertisements.
In this sentence, "comercial" is used as an adjective to describe an office related to commerce or business ("comercial office").
O escritório comercial está localizado no centro da cidade.
The commercial office is located in the city center.
Here, "comercial" functions as a noun referring to a television advertisement ("a comercial").
Assisti a um comercial interessante na TV hoje cedo.
I watched an interesting commercial on TV this morning.
Here, "comercial" is used as an adjective to describe the sector dedicated to business or trade activities ("comercial sector").