(adj) not in good physical or mental condition; out of condition, Ant. fit, Example:fat and very unfit; certified as unfit for army service; drunk and unfit for service
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. [ 1913 Webster ]