狰狞可畏的成语出处

清代蒲松龄的《聊斋志异·鹰虎神》。

后生可畏 hòushēng-kěwèi[a youth is to be regarded with respect—the younger generation will surpass the older] 后生:青年人。青年人可以积学成德,值得敬畏