In*apt"ness

from The Collaborative International Dictionary of English v.0.48

Inapt \In*apt"\, a. [Pref. in- not + apt: cf. F. inapte. Cf.
   {Inept}.]
   Unapt; not apt; unsuitable; inept. -- {In*apt"ly}, adv. --
   {In*apt"ness}, n.
   [1913 Webster]