Bloodcurdling
(adjective)
Extremely frightening or horrifying.
Origin:
From blood + curdling, from the appearance of curdled blood.
Examples:
- The horror movie had bloodcurdling screams.
- The bloodcurdling story gave him nightmares.
- The bloodcurdling sight of the accident made her faint.
- The ghost story had a bloodcurdling ending.
- The bloodcurdling scream was heard throughout the neighborhood.