If you describe something or someone as horrible, you do not like them at all.
Her voice sounds horrible.
她的嗓音难听死了。
You can call something horrible when it causes you to feel great shock, fear, and disgust.
Still the horrible shrieking came out of his mouth.
可他嘴里还是在发出吓人的尖叫声。
Horrible is used to emphasize how bad something is.
That seems like a horrible mess that will drag on for years.
那看来像是一个将要延续多年的糟糕困境。