tenacity
n.
early 15c., from Middle French ténacité (14c.) and directly from Latin tenacitas "an act of holding fast," from tenax (genitive tenacis) "holding fast, gripping, clingy; firm, steadfast," from tenere "to hold" (see tenet).
〔蒋〕[tain，ten，tin=hold握，持，守，-acity名词后缀，表示性质] 紧握，坚持，固执，顽强