headlong

With the head first or down.

[A] sharp-looking old dame, […] inhabited a "laigh [low] shop," anglicé [in English], a cellar, opening to the High-street by a strait and steep stair, at the bottom of which she sold tape, thread, needles, skeans of worsted, coarse linen cloth, and such feminine gear, to those who had the courage and skill to descend to the profundity of her dwelling, without falling headlong themselves, or throwing down any of the numerous articles which, piled on each side of the descent, indicated the profession of the trader below.

With an unrestrained forward motion.

Figures out today show the economy plunging headlong into recession.

When his eyes were clear again, he saw the monster had passed and was rushing landward. Big iron upper-works rose out of this headlong structure, and from that twin funnels projected, and spat a smoking blast shot with fire into the air. It was the torpedo-ram, Thunder Child, steaming headlong, coming to the rescue of the threatened shipping.

Rashly; precipitately; without deliberation; in haste, hastily.

Precipitous.

Their path led them past sharp cliffs, along narrow trails unknown and untrodden, past headlong boulders strewn across barren, treeless, wind-haunted heights.

Plunging downwards head foremost.

On sighting their prey, they check their flight and hurtle in a headlong dive to the sea.

Rushing forward without restraint.

Bumps, bruises, and scratches are often the result of their efforts to outstrip each other in the headlong race.

Reckless; impetuous.

“Time is up,” cried another boy, more headlong than head-monitor.

To precipitate.

If a stranger be setting his pace and face toward some deep pit, or steep rock — such a precipice as the cliffs of Dover — how do we cry aloud to have him return ? yet in mean time forget the course of our own sinful ignorance, that headlongs us to confusion.

Carriages went up and down in endless pageant. Trolley-cars rushed by, clanging and grinding as they headlonged into the side streets.