My father was unable to talk about the war, it was so frightful.我父親沒法談?wù)撃菆?chǎng)戰(zhàn)爭(zhēng)，那太可怕了。
ADJ
非常的;極度的
Frightful is used to emphasize the extent or degree of something, usually something bad.
例句
He got himself into a frightful muddle...他把自己卷進(jìn)了一個(gè)不可收拾的亂攤子。What frightful gossips people are, even one's best friends.人們最愛散布流言蜚語，哪怕是自己最好的朋友也不例外。