tenacious
adj.
c.1600, from Latin stem of tenacity + -ous. Related: Tenaciously; tenaciousness.
〔蒋〕[ten握，持，执，守，-acious形容词后缀，…的] 紧握的，坚持的，固执的，顽强的
〔李〕[ten=to hold持；-ac;-ious a.=tending to有……倾向的→] a. tending to hold opinion, belief, etc. strong;stubborn 坚强的；固执的