-ability

also -ibility noun suffix Etymology: Middle English -abilite, -ibilite, from Anglo-French -abilité, -ibilité, from Latin -abilitas, -ibilitas, from -abilis, -ibilis -able + -tas -ty capacity, fitness, or tendency to act or be acted on in a (specified) way Example: agglutinability

Merriam-Webster's Collegiate Dictionary