hammer
US /ˈhæm.ɚ/
UK /ˈhæm.ɚ/

1.
martelo
a tool with a heavy metal head mounted at right angles to a handle, used for jobs such as breaking things and driving in nails.
:
•
He used a hammer to nail the boards together.
Ele usou um martelo para pregar as tábuas juntas.
•
The carpenter always keeps his hammer close by.
O carpinteiro sempre mantém seu martelo por perto.
2.
cão (arma de fogo)
the part of a firearm that strikes the primer or firing pin to detonate the charge.
:
•
He pulled back the hammer of the pistol.
Ele puxou o cão da pistola para trás.
•
The gun's hammer clicked into place.
O cão da arma encaixou no lugar.