proclivity
Concise Oxford English Dictionary © 2008 Oxford University Press:
proclivity /prəˈklɪvɪti/
▶noun (pl. proclivities) an inclination or predisposition.
– origin C16: from L. proclivitas, from proclivis ‘inclined’, from pro- ‘forward, down’ + clivus ‘slope’.
'proclivity' also found in these Oxford entries:

