te·nac·i·ty /təˈnæsəti/
 固執,不屈不撓,頑固,堅韌


 Te·nac·i·ty n.
 1. The quality or state of being tenacious; as, tenacity, or retentiveness, of memory; tenacity, or persistency, of purpose.
 2. That quality of bodies which keeps them from parting without considerable force; cohesiveness; the effect of attraction; -- as distinguished from brittleness, fragility, mobility, etc.
 3. That quality of bodies which makes them adhere to other bodies; adhesiveness; viscosity.
 4. Physics 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.

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 tenacity
      n : persistent determination [syn: doggedness, perseverance,
           persistence, persistency, tenaciousness, pertinacity]