'Inaptitude' definitions:

Definition of 'inaptitude'

From: WordNet
noun
A lack of aptitude [ant: aptitude]

Definition of 'Inaptitude'

From: GCIDE
  • Inaptitude \In*apt"i*tude\, n. [In- + aptitude: cf. F. inaptitude. Cf. Ineptitude.] Lack of aptitude. [1913 Webster]