a. 恐怖的, 令人毛骨悚然的

[ adj ]
extremely alarming
<adj.all>

bloodcurdling \blood"curd*ling\ adj.
causing sudden intense fear due to an apprehension of
imminent bodily harm, to oneself or others. Awakened by a
bloodcurdling scream from right outside her window

Syn: hair-raising, nightmarish.
[WordNet 1.5]