Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

327. Tenacity — N. {ant.

328} tenacity, toughness, strength; (cohesion) 46; grip, grasp, stickiness, (cohesion) 46; sequacity†; stubbornness &c (obstinacy);; glue, cement, glutinousness†, sequaciousness†, viscidity, (semiliquidity) 352. leather; white leather, whitleather†; gristle, cartilage. unbreakability, tensile strength. V. be tenacious &c adj.; resist fracture. grip, grasp, stick (cohesion) 46. Adj. tenacious, tough, strong, resisting, sequacious†, stringy, gristly cartilaginous, leathery, coriaceous†, tough as whitleather†; stubborn &c (obstinate) 606. unbreakable, indivisible; atomic.