11 frightening

frightening
adj
causing fear; alarming 引起恐惧的; 惊恐的; 可怕的
    a frightening possibility, situation, development, etc 引起恐惧的可能性、 形势、 发展等
    It is frightening even to think of the horrors of nuclear war. 核战争的恐怖状况连想都不敢想.