Verb
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make unfit or unsuitable
"Your income disqualifies you"
Adjective
-
physically unsound or diseased
"has a bad back"
"a bad heart"
"bad teeth"
"an unsound limb"
"unsound teeth"
-
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"
-
below the required standards for a purpose
"an unfit parent"
"unfit for human consumption"