Tenacity
/təˈnæs.ɪ.ti/
noun
The quality or state of being tenacious, or persistence of purpose; tenaciousness.
The quality of bodies which keeps them from parting without considerable force, as distinguished from brittleness, fragility, mobility, etc.
The effect of this attraction, cohesiveness.
Synonyms: cohesiveness, adhesiveness, viscosity, determination, persistency, retentiveness, stubbornness, tenaciousness