1. holding fast; characterized by keeping a firm hold (often followed by of ): a tenacious grip on my arm; tenacious of old habits.
2. highly retentive: a tenacious memory.
3. pertinacious, persistent, stubborn, or obstinate.
4. adhesive or sticky; viscous or glutinous.
5. holding together; cohesive; not easily pulled asunder; tough.
Hmmm, not too bad of a quality to have for everyone including indie authors.