propensity

英[prə'pensɪtɪ] 美[prə'pɛnsəti]

1. an inclination to do something;

"he felt leanings toward frivolity"

2. a natural inclination;

"he has a proclivity for exaggeration"

3. a disposition to behave in a certain way;

"the aptness of iron to rust"

"the propensity of disease to spread"