frightening
adj
causing fear; alarming 引起恐懼的; 驚恐的; 可怕的
a frightening possibility, situation, development, etc 引起恐懼的可能性、 形勢、 發展等
It is frightening even to think of the horrors of nuclear war. 核戰爭的恐怖狀況連想都不敢想.
It's a shame I haven't seen more of you these recent years.
真遺憾,最近幾年我未能見到你。
Winter was coming on and the hills threatened the surrounding villages with destruction, for heavy rain would not only wash away the soil but would cause serious floods as well.