a sword of `Damocles
/ˈdæməkliːz; `dæməˌkliz/ (fml 文) something unpleasant,dreadful, etc that seems to be about to happen to sb, and causes a feeling of apprehension and imminent danger 达摩克勒斯剑（比喻某人将有祸事临头）: The possibility of losing her job hung over her like a sword of Damocles all last year. 去年她一直提心吊胆生怕失去工作.
