insidious adjective uk/ɪnˈsɪd.i.əs/ us/ɪnˈsɪd.i.əs/
暗中为害的;隐伏的(of something unpleasant or dangerous) gradually and secretly causing harm
High blood pressure is an insidious condition which has few symptoms. 高血压是一种鲜现症状的潜伏性疾病。
Related words: insidiouslyinsidiousness