The Collaborative International Dictionary of English v.0.48:

Invulgar \In*vul"gar\, v. t. [Pref. in- in + vulgar.]
   To cause to become or appear vulgar. [Obs.] --Daniel.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Invulgar \In*vul"gar\, a. [Pref. in- not + vulgar.]
   Not vulgar; refined; elegant. [Obs.] --Drayton.
   [1913 Webster]