IPA: //ˈblʌdˌkɜːrdlɪŋ//
KK: /ˈblʌdˌkɜrdlɪŋ/
Causing a strong feeling of fear or horror.
The movie was filled with bloodcurdling screams that made everyone jump.
Bloodcurdling → It is formed from "blood" (from Old English "blōd", meaning the red liquid that circulates in the bodies of humans and animals) and "curdling" (from the verb "curdle", which means to coagulate or thicken, often used in the context of milk). The word "bloodcurdling" describes something that causes a chilling or terrifying reaction, as if it thickens the blood with fear.
Imagine a scene so terrifying that it makes your blood feel like it's thickening or curdling — that's the essence of what bloodcurdling means.
No commonly confused words.