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Definition of tenacity:

  1. That quality of bodies which keeps them from parting without considerable force; cohesiveness; the effect of attraction; - as distinguished from brittleness, fragility, mobility, etc.
  2. That quality of bodies which makes them adhere to other bodies; adhesiveness; viscosity.
  3. The greatest longitudinal stress a substance can bear without tearing asunder, -- usually expressed with reference to a unit area of the cross section of the substance, as the number of pounds per square inch, or kilograms per square centimeter, necessary to produce rupture.
  4. The quality or state of being tenacious; as, tenacity, or retentiveness, of memory; tenacity, or persistency, of purpose.


pertinaciousness, perseveration, resist, perversity, doggedness, willfulness, pertinacity, perseverance, obstinateness, perverseness, persistence, tenaciousness, continuity, pigheadedness, persistency.

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