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 ]
n. [ In- + aptitude: cf. F. inaptitude. Cf. Ineptitude. ] Lack of aptitude. [ 1913 Webster ]