threatening（adj.）
英 [ˈθretnɪŋ] 美 [ˈθretnɪŋ]
1520s, "portending no good; indicating or containing a threat," present-participle adjective from threat (v.). Related: Threateningly. In a Middle English glossary early 15c. Latin minax (adj.) is rendered by threati.
该词起源时间：1520年代