D defs.my
Entry 2 senses Webster, 1913

Proclivity

/prōk-lĭv'-ət-ē/ · Pro·cliv·i·ty · IPA /pɹoʊˈklɪvɪti/
01 n. Inclination; propensity; proneness; tendency.
  1. 1.
    Inclination; propensity; proneness; tendency.
  2. 2.
    Readiness; facility; aptitude.
    “He had such a dexterous proclivity as his teachers were fain to restrain his forwardness.” Sir H. Wotton.