The Collaborative International Dictionary of English v.0.48:
Unapt \Un*apt"\, a. 1. Inapt; slow; dull. --Bacon. [1913 Webster] 2. Unsuitable; unfit; inappropriate. --Macaulay. [1913 Webster] 3. Not accustomed and not likely; not disposed. [1913 Webster] I am a soldier and unapt to weep. --Shak. [1913 Webster] -- Un*apt"ly, adv. -- Un*apt"ness, n. [1913 Webster]