pro ‧ pen ‧ si ‧ ty /prəˈpensəti, prəˈpensɪti/ BrE AmE noun ( plural propensities ) [countable usually singular]
[ Date: 1500-1600 ; Origin: propense 'tending' (16-19 centuries) , from Latin , past participle of propendere 'to lean toward' ]
formal a natural tendency to behave in a particular way
propensity to do something
the male propensity to fight
propensity for
He seems to have a propensity for breaking things.