tenacidad
tenacity
tenacious
tenacious
+
-idad
noun suffix
Tenacidad means tenacity and can be thought of as tenacious0 + -idad1 (noun suffix1), forming the noun from the English adjective.
noun
- tenacityThe quality of being determined and persistentSu tenacidad le ayudó a superar todos los obstáculos. // His tenacity helped him overcome all obstacles.