My father was unable to talk about the war, it was so frightful.我父亲无法再谈起那场战争, 它太可怕了。

There was no frightful trauma.没有留下可怕的心理创伤。

He got himself into a frightful muddle.他使自己陷入极度困惑之中。

What frightful gossips people are, even one's best friends.人们都喜欢说三道四, 甚至连最好的朋友也是, 真让人生厌。