Does tenacious have a negative connotation?

Answer 1

In my opinion TENACIOUS has a positive connotation. It tells about the quality of the person to puruse something without getting disappointed and without getting stalled by negative feeling, nil results and opposition.

The negative feeling might ....just might be, of the person who is tenacious is pursuing something against your will. For eg. If you are a boss and fire a person and the person persistently follows various methods to get re-instated like...talking to higher bosses, asking other employees to support him, getting the union's help and perhaps even purusing a lawsuit in court and taking the help of church.................the person is tenacious, but it is not something you as a boss might like.

Persistence has a more positive connotation that tenacious.

Answer 2

No, "tenacious" generally has a positive connotation, as it describes someone who is persistent, determined, and willing to work hard to achieve their goals.