Wiktionary
bloodcurdlingly
adv. in a bloodcurdling manner
Usage examples of "bloodcurdlingly".
The actor was bloodcurdlingly ugly, with a big nose, a long double chin, and a slitted mouth set in a permanent one-sided grimace.
As the wag approached, she yelled bloodcurdlingly loud and leaped into the path of the wag, followed by her warriors from either side of the road.