/ prəˈklɪvəti; NAmE / noun
( pl. -ies ) proclivity (for sth / for doing sth) ( formal ) a natural tendency to do sth or to feel sth, often sth bad
SYN propensity :
his sexual / criminal proclivities
the government's proclivity for spending money
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WORD ORIGIN
late 16th cent.: from Latin proclivitas , from proclivis inclined, from pro- forward, down + clivus slope.