Webster’s Revised Unabridged Dictionary · 1913
Proclivity
Pro·cliv′i·ty (·klĭv′ĭ·ty̆), n. [L. proclivitas: cf. F. proclivité.]
1. Inclination; propensity; proneness; tendency. "A proclivity to steal." Abp. Bramhall.
2. Readiness; facility; aptitude.
He had such a dexterous proclivity as his teachers were fain to restrain his forwardness. Sir H. Wotton.