trepidation/ˌtrepɪˈdeɪʃn; ˌtrɛpə`deʃən/ n[U]great worry or fear about sth unpleasant that may happen （担心可能出事的）惊恐, 恐慌 The threat of an epidemic caused great alarm and trepidation. 流行病猖獗因而人心惶惶.
牛津英汉双解词典