Unfit

Un*fit" (?), v. t. [1st pref. un- + fit.] To make unsuitable or incompetent; to deprive of the strength, skill, or proper qualities for anything; to disable; to incapacitate; to disqualify; as, sickness unfits a man for labor; sin unfits us for the society of holy beings.

Un*fit", a. [Pref. un- + fit.] Not fit; unsuitable. -- Un*fit"ly, adv. -- Un*fit"ness, n.