hammer
US /ˈhæm.ɚ/
UK /ˈhæm.ɚ/

1.
martillo
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.
Usó un martillo para clavar las tablas.
•
The carpenter always keeps his hammer close by.
El carpintero siempre tiene su martillo cerca.
2.
martillo (arma de fuego)
the part of a firearm that strikes the primer or firing pin to detonate the charge.
:
•
He pulled back the hammer of the pistol.
Retiró el martillo de la pistola.
•
The gun's hammer clicked into place.
El martillo del arma encajó en su lugar.