1. (a.) Holding fast; persistent; stubborn; obstinate; inclined to retain what is in possession; as, men tenacious of their just rights.

2. (a.) Apt to retain; retentive; as, a tenacious memory.

3. (a.) Having parts apt to adhere to each other; cohesive; tough; as, steel is a tenacious metal; tar is more tenacious than oil.

4. (a.) Apt to adhere to another substance; glutinous; viscous; sticking; adhesive.

5. (a.) Closefisted; miserly.

6. (a.) Holding stoutly to one's opinion or purpose; obstinate; stubborn.

adamant adherent adhesive amylaceous assiduous balking balky bigoted bound bound and determined bulldogged bulldoggish bulldoggy bulletheaded bullheaded cartilaginous case-hardened chewy clabbered clammy clinging clingy clotted coagulated cohesive committed constant continuing coriaceous curdled decided decisive dedicated definite determined devoted diligent dogged dogmatic doughy durable earnest enduring faithful fanatic fibrous firm fixed game gamy gaumy gelatinous glairy gluelike gluey glutenous glutinose glutinous good gooey grasping gripping gristly gritty grumous gumbo gumbolike gumlike gummous gummy gutsy gutty hard hardheaded hardy headstrong heavy holding immovable immutable inalterable indefatigable indomitable industrious inflexible insistent inspissated intolerant intransigent invincible jelled jellied jellylike keeping lasting leatherlike leathery loyal maintaining mettlesome mucilaginous mulish nervy never-tiring obdurate obstinate opinionated overzealous pasty patient patient as Job permanent perseverant persevering persistent persisting pertinacious pigheaded plodding plucky plugging preoccupied purposeful rapt red-blooded refractory relentless resistant resolute resolved restive retaining retentive rigid ropy secure sedulous self-adhesive self-willed serious set sincere sinewy single-minded slabby sleepless slimy slithery slogging spirited spiritful spunky stable stalwart starchy staunch steadfast steady stickable sticky stiff stiff-necked stodgy stout stringy strong strong-minded strong-willed strongheaded stubborn sturdy sulky sullen syrupy tacky thick thickened tight tireless tough tough as leather tremelloid tremellose TRUE unabating uncompromising unconquerable uncooperative undaunted undiscouraged undrooping unfailing unfaltering unflagging unflinching unintermitting uninterrupted unnodding unregenerate unrelaxing unrelenting unremitting unshakable unshakeable unshaken unsleeping unswerving untiring unwavering unwearied unwearying unwinking unyielding utterly attentive vigorous viscid viscose viscous weariless wholehearted willful wiry