Emily Dickinson Lexicon

PRO-CLIV'I-TY, n. [L. proclivitas, proclivis; pro and clivus, a cliff.]

1. Inclination; propensity; proneness; tendency. The sensitive appetite may engender a proclivity to steal but not a necessity to steal. – Bp. Hall.
2. Readiness; facility of learning. He had such a dextrous proclivity, that his teachers were fain to restrain his forewardness. – Wotton.