disqualify, unfit, indispose -- (make unfit or unsuitable; "Your income disqualifies you")
Overview of adj unfit
The adj unfit has 3 senses
unfit -- (below the required standards for a purpose; "an unfit parent"; "unfit for human consumption")
unfit -- (not in good physical or mental condition; out of condition; "fat and very unfit"; "certified as unfit for army service"; "drunk and unfit for service")
bad, unfit, unsound -- (physically unsound or diseased; "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth")