hammer away

Next, the GOP should hammer away at how our roads, bridges, and tunnels are crumbling, and push for an infrastructure initiative.

Hammer away; only you might let us have our dinner in peace.

Thus, if you take an ordinary hammer and hammer away at a joke, the result of the experiment will illustrate the position!'

There was nothing to be done but to set his teeth and hammer away, and hope for release by the winter.

The blacksmith had begun to hammer away at a horse-shoe, and that was our signal to dash up to the door.

One can leave the door open and hammer away at the box, but they do not show any inclination to run away.