tenacious

Compared meaning: not giving up, staying firm (adjective).

比较义项：坚持不懈、顽强不屈，不轻易放弃（形容词）。

• persistent

  Persistent is the most general: it describes anything that keeps going or recurring over time despite difficulty, and can describe people, actions, or even things like rain or pain, not just willpower.

  persistent 含义最宽泛，指某事持续发生或反复出现且不轻易停止，既可形容人的坚持，也可形容雨、疼痛等非人称事物的持续，而不只是意志力。

  The persistent rain forced the team to postpone the outdoor game for a third time.

  持续不断的雨迫使球队第三次推迟这场户外比赛。

• tenacious 本词

  Tenacious emphasizes a firm grip or hold, literally (an animal biting and not letting go) or figuratively (holding tightly to a belief, goal, or possession); it highlights strength of grip more than duration.

  tenacious 强调紧紧抓住不放，既可以是字面上的（如动物咬住东西不松口），也可以是比喻的（紧抱某种信念、目标或所有物），更强调抓握的力度而非持续的时间。

  The tenacious puppy gripped the rope in its teeth and would not let go.

  这只顽强的小狗用牙齿咬住绳子，怎么也不肯松口。

• dogged

  Dogged describes stubborn, unglamorous effort in pursuing a difficult goal despite obstacles, almost always about a person's willpower; it often pairs with 'determination' or 'pursuit' and carries an admiring tone.

  dogged 形容在困难面前表现出的顽固、不张扬的努力，几乎总是形容人的意志力，常与“determination（决心）”或“pursuit（追求）”搭配，带有赞许的语气。

  Her dogged determination carried her through the last exhausting mile of the marathon.

  她那不屈不挠的决心帮她撑过了马拉松最后那令人筋疲力尽的一英里。

Persistent, tenacious, and dogged all describe not giving up. Persistent is the most general, describing anything that keeps going despite difficulty. Tenacious stresses a firm grip, literal or figurative, holding tightly to a goal. Dogged describes a person's stubborn effort against obstacles.

这三个词都可表示“顽强、不轻易放弃”，但语气和用法有别：persistent 最通用，可指人反复尝试，也可指雨、疼痛等事物持续存在；tenacious 强调像抓东西一样紧紧抓住不放，可用于字面的抓握或比喻的坚持信念；dogged 专指人在困难中埋头苦干、不屈不挠的意志力，常带赞许语气。