pertinacious

形容词 pertinacious:

1. stubbornly unyielding
   同义词：dogged, dour, tenacious, unyielding

1. She is the most vocal and pertinacious of all the critics of the policy.
   在所有的政策批评家中，她是陈词最多而且最为固执的。
2. His style of argument in meetings is not so much aggressive as pertinacious.
   他在会议上的辩论态度并非锋芒逼人而是坚持己见。

per.ti.na.cious

adj.（形容词）
Holding tenaciously to a purpose, belief, opinion, or course of action.
坚持的，固执的：固执地坚持目标、信仰、意见或行动路线
Stubbornly or perversely persistent.See Synonyms at obstinate
顽固的：顽固地或刚愎地坚持的参见 obstinate

来源：
From Latin pertin3x pertin3c-
源自 拉丁语 pertin3x pertin3c-
per- [per-]
per- [前缀，表示.极，完全.等意]
ten3x [tenacious] from tenôre [to hold] * see ten-
ten3x [固执的] 源自 tenôre [坚持] *参见 ten-

【引伸】
per.tina.ciously
adv.（副词）
per.tina.ciousness
n.（名词）