propensity
/prəʊˈpensətɪ/noun
(pl. -ies)
- an inclination or natural tendency to behave in a particular way倾向, 习性：
she has a propensity for breaking plates
她总会打破盘子
with infinitive their innate propensity to attack one another.他们互相攻击的天生习性。
词源
late 16th cent.: from archaic propense （from Latin propensus 'inclined'，past participle of propendere,from pro- 'forward，down'+pendere 'hang'）+-ITY.