propensity

n 1: an inclination to do something; "he felt leanings toward

frivolity" [syn: {leaning}, {tendency}]

2: a natural inclination; "he has a proclivity for

exaggeration" [syn: {proclivity}, {leaning}]

3: a disposition to behave in a certain way; "the aptness of

iron to rust"; "the propensity of disease to spread" [syn:

{aptness}]