This is the 11213th most frequent Portuguese word.
martelar
"Martelar" means "to hammer" or "to repeatedly emphasize or insist."
Here, the word "martelar" is used to literally represent the action of hammering a nail into a surface.
Eu vou martelar um prego na parede.
I will hammer a nail on the wall.
In this case, "martelar" is used figuratively to indicate repetition and emphasis on a point made repeatedly.
Ele não parava de martelar a mesma ideia durante a reunião.
He kept hammering the same idea during the meeting.
Here, "martelando" represents the ongoing action of using a hammer in an ordinary sense, denoting activity happening in the environment.