1ADJ-GRADED 讨厌的;令人不快的;可怕的Frightful means very bad or unpleasant. 讨厌的;令人不快的;可怕的 [old-fashioned]
My father was unable to talk about the war, it was so frightful.
我父亲没法谈论那场战争,那太可怕了。
2ADJ [ADJ n]非常的;极度的Frightful is used to emphasize the extent or degree of something, usually something bad. 非常的;极度的 [informal, old-fashioned, emphasis]
He got himself into a frightful muddle.
他把自己卷进了一个不可收拾的乱摊子。
What frightful gossips people are, even one's best friends.