lu·bric·i·ty /luˈbrɪsəti/
  光滑,淫蕩,不穩定,狡猾
  Lu·bric·i·ty n.
  1. Smoothness; freedom from friction; also, property which diminishes friction; as, the lubricity of oil.
  2. Slipperiness; instability; as, the lubricity of fortune.
  3. Lasciviousness; propensity to lewdness; lewdness; lechery; incontinency.
     As if wantonness and lubricity were essential to that poem.   --Dryden.
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