#inaptitude  a lack of aptitude
  exclusion:  aptitude
  supertype:  inability  lack of ability (especially mental ability) to do something
  subtype:  talentlessness  a lack of talent
  subtype:  incapableness__incapablenes  lack of potential for development
     subtype:  imperfectibility__imperfectability  the incapability of becoming perfect

No statement uses or specializes inaptitude; click here to add one.