the.com/hammer drill

means A power drill that adds a rapid hammering motion along the bit's axis while it spins, letting it bore through brick, concrete, and stone instead of just stalling against them.

from A straightforward compound: 'hammer' plus 'drill,' naming exactly what it does — the tool pairs rotary drilling with a percussive, hammer-like pulse, a mechanical idea that emerged as manufacturers found ways to combine rotation with rapid axial blows (via a cam or clutch mechanism) to crack masonry rather than just chew at it. No hidden story here; the name is as literal as the tool is practical.