Source : Webster's Revised Unabridged Dictionary (1913)

Immorigerous \Im`mo*rig"er*ous\, a. [Pref. im- not +
   morigerous.]
   Rude; uncivil; disobedient. [Obs.] --
   {Im`mo*rig"er*ous*ness}, n. [Obs.] --Jer. Taylor.