Wiktionary
hurtlingly
adv. In a hurtling manner; very rapidly.
Usage examples of "hurtlingly".
He could move, and if he chose he could leap off the evil Shantak that bore him hurtlingly doomward at the orders of Nyarlathotep.
Then, as if suddenly instinct with life, it leaped hurtlingly down to alight on the steep incline, to bound more swiftly into the air, to gather momentum, to plunge into the lofty leaning crag below.